Hydro Flask Insulated Water Bottle - 40 oz

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Hydro Flip Lid
Straw Lid



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The Hydro Flask 40 oz Wide Mouth stainless steel water bottle is made for serious hydration and liquid storage. Whether you're walking into an intense workout or simply trying to get through a day in the office, the 40 oz water bottle will do the job.

The larger mouth opening makes the 40 oz a great option for mixing sports drinks or storing smoothies, and our double wall vacuum insulation ensures that cold liquids will stay cold for up to 24 hours, while hot liquids remain hot for up to 12.

The 18/8 food-grade stainless steel interior is non-porous, preventing residual bacteria buildup and hints of yesterday's beverage. Our insulated Wide Mouth Flat Cap further protects your liquid cargo from the elements, and is made from recyclable BPA-free PP#5. Like all Hydro Flasks, the 40 oz is backed by our lifetime warranty. Look for the H-guy and Hydro Flask logo to ensure you're getting the market's premium insulating beverage bottle.


  • Large (Wide Mouth) opening
  • Double Wall Vacuum Insulated
  • Keeps Hot up to 12 Hours
  • Keeps Cold up to 24 Hours
  • BPA-Free
  • 18/8 Stainless Steel
  • Signature Powder Coat Finish
  • Lifetime Warranty

Posted by Kim Wolf on 02/25/2015

5 Star Rating

Homemaker, Health & Beauty Buyer at Healthy Alternative

I was given my wonderful large Hydro Flask from a rep at couple months ago & I have used it everyday since. I make a pot of my own tea blend every morning, fill my flask & refill my thermos that I keep out on the sales floor, all day long. EVERY TIME I re-open the flask for a refill, my tea is STILL piping hot. I absolutely LOVE it & I'm trying to get our owner to carry them in the store.

Posted by Ed on 02/24/2015

5 Star Rating


This is by far the best thermos I've owned. I have pretty much every model they've designed. My go to 40oz that I bought nearly three years ago is still going strong after numerous drops on the cement and trail and shows tons of character. Customer service is incredible. I've had to use them several times for replacement caps caused by my own carelessness and they have never given me any grief about sending a replacement.

Posted by LCES on 02/03/2015

4 Star Rating


For those who complain about their flask not keeping hot liquids hot... the proper way to use a thermos: 1. Start with empty thermos. 2. Fill with HOT water from sink. 3. Let stand for 5 minutes. (to heat molecules) 4. Empty your HOT water. 5. Fill with your hot beverage of choice. ---- I would have rated this 5-stars if they used 100% stainless steel. Even after making it in China you'd think you guys could spend the few extra dollars for proper steel. Even after We, the consumer already pay a pretty penny for this product. I guess we pay for the name and for you to maintain your living in the over-priced Bend area.

Posted by Leah on 01/24/2015

5 Star Rating


My Grandparents gave this to me for Christmas and it is the best water bottle I have ever owned. I use it every day and fill it up about twice a day. It's a little larger than most so if you are looking for convenience then I would say get a smaller size. But if you are looking for a lot of water, keeping it cold all day, great durability and looks, then this is your bottle!

Posted by Karen H. on 01/14/2015

2 Star Rating


The flask does hold heat very well but it leaked!!! It leaked on my clothes and in my car. The lid did not seal very well. Very disappointed.

Posted by Tom on 01/09/2015

5 Star Rating

Quality Product and Amazing Performance

I have had my 40 oz. flask for about two weeks. I fill it 1/3 with ice and top off with water and take it to work. The ice remains through the day, and even after topping off with a refill of water during the day without adding more ice I still have a little ice left on my way home at night. I saw a another review that said the ice melted within 4 hours. That has definitely not been my experience. I use it with the straw lid. All of the components are well made. This is a great product I would recommend to anyone. The reason I am on this website is to see what other models they have because I will be buying some for family.

Posted by AD on 01/05/2015

2 Star Rating


I've always wanted a hydro flask after hearing the great qualities of it but when I finally got it, I was very disappointed. On the very first day, I filled it up with ice and water and took it to work. Next thing you know not even four hours into my shift my ice was melted and it was like I was drinking Luke warm water. So not what I was expecting. Not worth it for the price!!!!

Posted by Pam on 01/03/2015

5 Star Rating

A favorite gift!!!

I received a 40 ounce thermos a year ago as a Christmas present and have used it daily ever since. I use it exclusively for ice water. I don't need to use much ice because the thermos keeps it cold all day. I rang in 2015 by buying another 40 oz and a 20 ounce that I will use for coffee. I travel a lot and am so thankful for these products!!!

Posted by Jenny Harper on 01/02/2015

4 Star Rating

Quality product

I've owned my 40oz. wide mouth Hydro Flask for 2 years now, and I can no longer imagine myhttps://s3.amazonaws.com/hydroflask/images/star-on.png life without it. I work in a UPS hub and so this flask needs to be able to take a beating. Boy can it! It's been dropped from 10 ft. numerous times. It's been kicked. It's been knocked onto a moving conveyor belt. It's dented, scratched, and some of the Everest blue coating has chipped off. Yet it keeps my drinks just as cold now as it ever has. I'll skip the usual complaint with the short longevity of the wide mouth flat cap. I don't think it lasted a full year, but I can say that at least it didn't sweat like the straw lid tends to do. If you can combine the durability of the straw lid with the efficiency of the flat cap then I suspect the lid would no longer be a detraction from the overall quality of an otherwise superb product...

Posted by Lee on 12/27/2014

4 Star Rating

Great looking flask, a little wide for my hand

I love this flask however it's a little wide & heavy for my hand when full. Might go with a narrower flask and give this one to my hubby.

Posted by Richard on 12/10/2014

2 Star Rating

Buy a different Stainless Bottle

If you want to keep your coffee hot at the office, I've never come across anything better. Unfortunately, I dropped it down a trail. It bounced/fell/rolled about 30yd. The outer shell is punctured, it doesn't keep anything insulated anymore. After four trips out (first time I dropped it) mine is retired. This is definitely not for active users. It's a very effective insulator, but cheaply made, don't waste your money.

Posted by JDK on 12/10/2014

1 Star Rating

One drop and it doesn't work!

I got the 40 oz. stainless water bottle a week ago and was ready to call it the best water bottle every. Unfortunately, just today it got bumped off a 36" counter and that's all she wrote. There's a small dent near the top and I can hear something rattling around inside the walls. Now it doesn't keep liquid cold and it's basically an overpriced water bottle with no insulation. One drop! Are you kidding me? for a product that is marketed to active people and the warranty doesn't cover it. I would have at least appreciated a warning that said, "Do not drop our fragile product or it won't work as advertised."

Posted by Donsjunebug on 11/30/2014

5 Star Rating


Just got my 40oz in the mail! Went on a 9 hour road trip, and the ice I put in it before we left, was almost all still there when we returned home! LOVE, LOVE, LOVE this! Will be ordering more!

Posted by Life Changing on 11/17/2014

5 Star Rating

My Buddy and Me!

My sister and I came across these at Whole Foods, like when we were kids, we decided we needed matching ones. It was record heat here in California and of course most of our homes do not come with AC. I was getting up every few hours to throw ice in my water to cool down. Just the fact that for almost 24hours my ice water stays iced water is wonderful. I'm more hydrated and now after getting his own my husband and I give them to our friends as gifts. Some of our friends don't want to wait LOL

Posted by Army7532 on 11/08/2014

5 Star Rating

Great Bottle

This is the best insulating bottle ever. It keeps my drink extremely cold all day long and even into the next day. Does not sweat or leak. Great product.....

Posted by Nicholas on 11/04/2014

5 Star Rating

Love it so far!!!

I received a red Eagle Scout Hydro Flask as a gift recently and I love it so far!!! Keeps water cold for hours, doesn't sweat, and it's just amazing. I have no complaints thus far. Been a great piece of gear to have!!!

Posted by Not happy on 10/10/2014

2 Star Rating

do not drop

Just got it went fishing dropped on rocks vac gone lifetime warranty wont cover. p.o.s. not real stainless rust too.

Posted by Hawaiian on 10/10/2014

2 Star Rating

lifetime warranty not true

dropped it wont keep ice. not covered by warranty spent big bucks china junk. dont buy read warranty. also rust, stainless china steel. lol. wanted to leave no rating but can't.

Posted by Dwight on 10/10/2014

2 Star Rating

weak cant take a hit. Wanted to give one star but but web site wont let me.

Got it as a gift loved it. Dropped it once and ice wont last anymore. lifetime warranty crap. put a cover on it or its trash. made in china crap cant even make it in the U.S.A. Americans need jobs more.

Posted by Helena on 10/07/2014

3 Star Rating


I have been looking for something 40oz for 10 years. When I saw this at the Aloha Swap meet in Hawaii I bought it immediately with great joy. I love it so much. It couldn't be more perfect till I noticed rust stains inside the bottom! :( I'm so BUMMED! How can stainless steel rust!!!!??????

Posted by Mohamed on 09/21/2014

5 Star Rating

Color: Black Butte

when the color of Black Butte will be available to buy ?

Posted by CINDY XIAO on 09/17/2014

5 Star Rating


We are a professional manufacturer of water bottle: 1.Ten years' experience in producting and exporting 2.Both FDA&LFGB food grade material 3.Best service & professional exporter 4.Reasonable price 5.Disney Sedex Audit

Posted by Honey on 08/25/2014

4 Star Rating

Doesn't look exactly like the picture!!! :(

Is it just me or the bottle they send just doesn't look exactly like the one in the picture... It doesn't have the word "insulated" in the ones they send and also the part on the bottom of the lid doesn't come fully colored but rather just plain stainless steel color!!! Hydro Flask should update their online pictures to match the products they're sending... Other than the above issues, my fingers crossed that I wouldn't have any problem with the bottle in the future...

Posted by wild child in michigan on 08/24/2014

5 Star Rating

no substitute!!!!!

My husband bought us each a bottle 2 years ago and we have used and abused our 40oz bottles and they have exceeded our expectations. My bottle goes with me everywhere, it keeps my H2O cold and has kept our chili hot on winter snowshoeing excursions! When our caps broke, we were sent new ones in a flash! Thanks for being an awesome company with durable products that work!

Posted by Dave H. on 08/19/2014

5 Star Rating


This water bottle works so well I can't believe how long I suffered with my old Camelbak. The sport top mouth piece provides a good flow and locks down well with no leaking. I drive in the Texas summer heat and leave it in the car for a couple of hours while at various job sites, when I get back the water is still cold. I did notice a bit of a plastic flavor in the water from the straw if I leave it in the bottle overnight, so now I empty it and leave it open, then fill in the morning, problem solved.

Posted by Geoff C on 08/09/2014

5 Star Rating

Fantastic, Would strongly recomend

Awesome water bottle, super durable, keeps hot stuff hot, and cold stuff cold.

Posted by JaxGirl on 08/09/2014

5 Star Rating

Florida summer gardener's best friend

Summers in Florida are HOT, sticky and muggy but the garden still needs attention. I fill my 40 oz Hydro Flask with ice and water and take it out there with me. I do a little gardening, stand under the shade tree and sip ice cold water, and go back and do a little more gardening. My Hydro Flask keeps me making steady progress throughout the day. Did I mention it was a gift from my son - good son he is!

Posted by Felicia on 08/07/2014

4 Star Rating

Good but heavy

I've had my hydro flask for about 1.5 years. Insulation is great. Narrow enough enough to fit in mesh pocket on side of backpack. The rubber strip around lid has separated from the lid so sometimes it's difficult to open (not a big deal). It has survived flying across the parking lot when full. Dinged up a bit but not damage to functionality. I usually carry by loop on lid if not carrying a bag which I do not suggest. Btw dropping flask a few times and carrying in this manner my lid broke-bummer. Biggest downside is it is freaking heavy. I'm an aerialist and my forearms and grip get tired after a few minutes :).

Posted by Sunny on 08/01/2014

2 Star Rating

Watch out for rust

Great bottle keeps water cold, although I found a brown spot, which looked like rust on the very bottom of the inside. I returned it and they replaced it fairly quickly...and just a few months later again same brown spot...it's rust!! I saw the previous comment from another user that his has rust too and was made in China? Is this true?

Posted by Daniel on 07/30/2014

2 Star Rating

Works but watch for RUST!

So after using the bottle for about 10 months I'm impressed, it keeps stuff cold or hot as advertised. However, I noticed a spot inside the bottle. After further inspection it's rusting. The warranty covers it but it'll be just several days short of a month for the exchange process. Ridiculous.

Posted by Ronnie Bell on 07/27/2014

5 Star Rating

I love mine

I love mine, it's everything they say and more. And trust me their customer service is stellier!

Posted by Matt on 07/24/2014

5 Star Rating

Poor Awesomeness

I got one of these a couple years ago for Christmas and use it all the time. I live in Arizona and left this in my truck, temp in the truck had to be upwards of 130 degrees and three hours later, the water inside was still cold! Amazing! And not only that, it's tough. I've unfortunately dropped it a bunch of times and there are some dings and dents, but still is in great shape. I'm not sure if it has some tank technology in it or something. Thanks Hydro Flask for the great product!

Posted by Corey on 07/21/2014

5 Star Rating


I've had the 40 oz hydroflask for a few weeks and I am still amazed at how cold it keeps my water. I carry it with me everywhere and I tell everyone how awesome it is.

Posted by Bryce on 07/19/2014

5 Star Rating

Nothing but the best

I have had no problems! Reading all the other reviews say lids or edge is sharp or this or that. Well I have no idea what they are talking about! This dose a great job keeping my water ice cold all day long with no problems. Super strong and the lid for me is a huge strength and easy to use! I really and highly recommend this to anyone who wants a high quality container!!!!

Posted by Brian Buckner on 07/14/2014

3 Star Rating

Lid Broke

Nice product but for the faulty lid. Its screwed on with a little screw that seems destine to fail over and over.I have written the company for a solution. It seems that the obvious solution is to buy the Different lids;-) Maybe the company should not sell them with these faulty lids. That would help the rating s for sure and sales. kindest Regards Brian

Posted by Geno on 07/12/2014

3 Star Rating

Read the bottom "Designed in Bend, OR - made in China

Says it all, doesnt it...?! First issue was the razor sharp edge they want you to hang your lips over. After I sanded it down with some medium-fine sand paper, only then was it usable. The strap on the lid broke within the first few weeks of use. I have dropped the bottle a few times, the last time the lid cracked and now the liquid doesnt stay cool for more then an hour or so. (Obviously my fault) Would I buy another one? Maybe, because at the time of purchase it was better then most water bottles on the market. But I will shop around before I buy another.

Posted by Tony on 07/12/2014

2 Star Rating

Lid Breaks

The bottle is good and insulates well, but the strap on the lid breaks. I've seen other people with the same bottle and the same issue at the gym.

Posted by 40 oz water bottle on 07/11/2014

5 Star Rating

Ice forever

I never write reviews. Someone just gave me the 40 oz water bottle as a gift. I put a bunch of ice and water in it and went camping in 90 degree weather. After 48 hours the ice had not completely melted. I am a huge cold water fan and this is hands down the best water bottle I have ever had. zero condensation on the outside and for the size extremely light. I will never buy a water bottle from another company. Thank you so much for being GENIUS.

Posted by John Mc. on 07/11/2014

5 Star Rating


I love my Hydro Flask. I've had it for 8 months now and ZERO PROBLEMS. After hiking and dropping it more times than I care to count, there were no problems. My only qualm is that Hydro Flak is out of Beer Growlers right now!!

Posted by E. Oliuver on 07/05/2014

4 Star Rating

Great Bottle Crappy Lid...great bottle Though!

-I love this water bottle. PERIOD. I have owned several flask from other venders but HF is by far the best. Amazing insulation (cold/hot drinks)and it is super durable. -It is quite large in person...I would avoid trying to bring it on a run. The flask is pretty substantial when filled, you will notice that when placed in a bag or on a bike mount. -To mirror what others have said, the lid that comes with the flask is not the best. The leash broke and the grip has come loose. Please HF, make a stainless steel screw in lid for this!

Posted by Lynne on 07/03/2014

5 Star Rating


I live in So CA where the summer temps get up to 108 degrees. My Hydro Flask is totally amazing. I put ice in it then fill with water. There are times it has been left in my car for up to 5 hours and there is still ice in it. I sometimes have to refill it with water. I have brought the flask into the house and have left it overnight and in the morning the ice is still there ! I am going to order the 40 oz. Best water bottle I've ever owned, have given all my other bottles to the thrift store.

Posted by Megan on 06/30/2014

5 Star Rating


I take my 40 oz Hydro Flask with my EVERYWHERE. Although it's fairly large, it's definitely worth having with me at all times. It retains ice cubes and freezing cold temperatures like no other water bottle. I can leave it in my car for hours during hot, summer days and the liquid inside is still ice cold when I return. I would highly recommend a Hydro Flask!

Posted by Todd on 06/27/2014

5 Star Rating


Works great and so easy to carry!

Posted by Todd on 06/27/2014

5 Star Rating

Great Product!

I bought this to replace a 32 oz thermos that was on its last leg. I searched for a long time trying to find something that was the same size (where I keep it I couldn't go any bigger). A friend turned me on to Hydro flask. This thing will keep ice all day even inside a car! I bought the straw top and it's so easy to carry with one finger. I work nights, and I filled this up with ice and water at noon. The next day at 10am, I had to run hot water in it to get the rest of the ice out!

Posted by Abner from Dallas, TX on 06/26/2014

1 Star Rating

rust marks inside the bottle

This is the second bottle I have. I also have the growler. I loved this products until I found rust marks inside the 40 oz bottle. I never expected a 18/8 stainless steel bottle to rust. In fact, it will not rust, meaning it is not 18/8 stainless steel or at the time of production they used regular steel. Anyway I send an email and I have to send it back. Hydro Flask didnt even pay for the shipment of a defective product. I started to like their products but not anymore. And if you have a defective product expect to pay for shipment besides what you paid for the product itself.

Posted by Will on 06/26/2014

5 Star Rating

Very Good Product

I absolutely love this bottle. It is a great size for me to get through an entire soccer practice without running dry, and I don't need to worry about keeping it out of the sun because no matter what, the water inside stays pleasantly cool. The lid, like all water bottles is a bit of a weak point but the weak point, but the bottle itself is tough as nails, having survived several drops that have crippled other metal water bottles I've owned with barely even a scratch on the coating. From soccer to hunting to school this has been a wonderful bottle for me because of its sturdy construction and size. It is a large water bottle however, so I'd recommend one of the smaller Hydro Flasks if your use of it will require portability. Love this bottle!!

Posted by Chris B on 06/19/2014

5 Star Rating

Very Happy

I am really happy with this water bottle. I was skeptical at the begging that this would keep water cold even in temps over 100 degrees all day. I am a roofing contractor and I take this flask everywhere i go now. Keeps ice all day this thing rocks!

Posted by Moni-Cat on 06/17/2014

5 Star Rating

Best on the Market!

I am a water bottle junkie. I have spent a good part of my life searching for a good, quality water bottle and I finally got one when I received my Hydro Flask as a gift from my sweetheart. If anything, HF understates the bottles ability to keep water cold, as with my experience, ice will stay in the bottle for well over 24 hours; unless I'm out in 105 degree weather. I will definitely be buying more!

Posted by Geoff on 06/16/2014

5 Star Rating

Off road and keeping cool

I used my 40 oz. bottle for the first time over four days of off road riding on a quad and the bottle did great. With limited space having a container keep liquids cool all day is a huge benefit. After my last ride I emptied the bottle the next day and there was still ice in the drink after about 35 hours!! Amazing!

Posted by Kieran Garcia on 06/09/2014

5 Star Rating

Great Insulataed Water Bottle

I have had my Hydro Flask for over a year now and it has not lost any of it's qualities whatsoever. It has remained leak proof and still does its job. I have tried other water bottles in the past, both insulated and non insulated, and the Hydro Flask is much more reliable and honestly just look more bad ass than other water bottles. I would definitely recommend this to anyone that spends time outdoors or for someone who just wants a great reliable water bottle.

Posted by Chris on 06/04/2014

4 Star Rating

Great bottle, poor lid

I absolutely love this bottle and am frequently asked where I got it. I have dropped it out of a moving car, as well as ran it over with my Chevy blazer and the bottle has not been compromised. The only downside to the bottle is the cap; the strap connecting it to the bottle broke in less than 2 weeks. Also, the rubber band that circumnavigates the cap becomes loose and makes it difficult to remove the cap when tightened. Overall a great bottle, and customer service will help you out with any cap problems with their lifetime warranty.

Posted by Laura on 05/29/2014

5 Star Rating

Durable, great water bottle

I believe I already wrote a review for this product, but I can't figure out how to update it. When I first bought the bottle 2-3 months ago I gave it great reviews. It keeps water cold for a while. I've left it in the car for hours (and I live in Phoenix). The bottle itself gets very hot, but the liquid inside stays cool. A lot of people have been disappointed in the lids, but I bought a flip-top lid. It says this lid may leak, but I still haven't had any issues with it leaking. I was a little concerned about the durability, but it has held up very well. I teach first grade and sometimes let the kids fill up my water bottle as a job. It's a heavy bottle, so the kids have dropped it more than once. The bottle has many dents from drops, but this has not affected the integrity of the bottle.

Posted by Stu on 05/18/2014

5 Star Rating

Worth every penny!

I emptied my cooler after camping and had three carbonated adult beverages left. So I poured them in the flask, tossed it in the bed of the truck and headed home. (A two and a half hour drive in 70 degree weather). 9 1/2 hours later I remembered it and had a delightfully cold drink before bed. Just like it was right out of the fridge! I will definitely be buying more. I don't care what colors are left either. I will take pink if it's the only one in stock!

Posted by Jane Doe on 05/18/2014

5 Star Rating

Best Water Bottle EVER

I have had tons of water bottles and this is by far my favorite! I have had it for 3 months and I cannot go anywhere with out it! It keeps my ice almost all day even when sitting in my car!!

Posted by Rebecca Fay on 05/15/2014

5 Star Rating


I recently bought this water bottle, and I swear I have about 50 water bottles, always trying to find the best one! Well I FOUND IT!!! I put ice in it and it lasts until the next day, no joke!! I love love love this water bottle. The only thing I would suggest is some sort of handleto slide onto it, I drink a LOT of water and its hard to hold it sometimes because it's a large bottle. Thank you for making this - it is WELL worth the money!!

Posted by joe on 05/04/2014

4 Star Rating

very high quality bottle and newly redesigned cap

I purchased two 40 oz and 18 oz that I found at the local swap meet (flea market) as I saw they were made extremely well. I tested them upon getting home. the 40oz wide mouth I 1/2 filled with ice and then 1/2 filled with cold water. There was still a bit of ice 8 hours later after leaving outside in 75 degree sun. the other 18 oz wide month I filled with my morning leftover coffee and added a touch of milk and a bit of sugar to maybe drink later in the day. 8 hours later it was luke warm at best. Not "hot" as advertised. overall a very high quality product that almost does exactly what it states it to do.... btw - no problems with the new caps as of yet. (I have had them 3 weeks now)

Posted by Mindy on 05/01/2014

4 Star Rating

Love the Flasks!!

I love this bottle. we use them for Horseback riding and they are great. the first time out it got dropped and then kicked by the horse and only got a small dent! It didn't even scratch it. The only thing I wish you made was a 24 ounce bottle with the wide mouth so you can use the straw lid. that would be perfect for the car. The 40 ounce I have dosen't fit in my cup holders. Any chances of there being one in the future?

Posted by Nick on 04/26/2014

5 Star Rating

No regrets

This 40oz bottle was my first and favorite hydro flask. I am very careless with my hydro flask and it has held up extremely well. I have since bought 2 more different sized bottles and am equally impressed with them. I was turned on to hydro flask over 2 years ago and have converted many of others who witness the quality of the bottle and its ability to keep your drink cold for an insane amount of time. Let this be the last water bottle you ever need to buy!

Posted by Phil H. from Fresno, Ca. on 04/21/2014

5 Star Rating

The best.

I've had so many water bottles that I don't remember the count. So, I do feel qualified to compare these to the many other water bottles out there on the market. Hydroflask are by far the best liquid container on the market today. They keep any liquid hot or cold whatever you want for most of the day or night and there is nothing on the market that does anything other than just hold liquids. These containers hold liquids very well and also keep the liquids hot or cold for long periods of time. These liquid containers, Hydroflasks are truly the best out there on the market, so one does not have to look at any further for a better liquids container. I have the 40 oz. & 21 oz. containers and use them daily, I even have one on my night stand to use throughout the night for cold water.

Posted by Disappointed on 04/18/2014

1 Star Rating

Only 2 out of 9 products in stock

I came and read the reviews and was so excited to order a 40 oz hydro flask until I clicked on every color I liked and they were all out of stock!! The fact that there are only 2 colors out of 9 available is insane. Someone needs to figure it out in production because that is just ridiculous. Guess I won't be buying one after all. :/

Posted by Joan on 04/10/2014

5 Star Rating

Best I've ever owned

This bottle is unbelievably great. I play golf in Arizona and today it reached triple digits in the temperature and I still had ice in my Hydro flask after 18 holes of golf and about 5 hours of pretty hot temps. I love this bottle!!!

Posted by Brandi on 04/09/2014

5 Star Rating

Awesome Customer Service!!

I purchased 2 of these bottles and while one kept water ice cold for over 24 hours, the other did not...and on top of that it would sweat too! But thank goodness for the lifetime warranty I was able to get a replacement fast with the help of the best customer service EVER! Not only were they quick in responding to the problem, but they were also quick in sending a replacement. Loving Hydro Flask!

Posted by Mangotiff on 03/19/2014

5 Star Rating

Hot Yoga Savior

This is by far the greatest water bottle that I have ever owned! I do hot yoga a few times a week and the bottle keeps my water super cold and refreshing in the 105 degree room. It's honestly the only way I get through the 90 minute class! Thank you so much for the great bottle-I'll sing your praises to everyone!

Posted by Nanker Phelge on 03/17/2014

3 Star Rating


the good: holds lots of water, doesn't sweat, ice cube friendly, twist lid doesn't leak and seals well, light weight. the bad: noticed a waxy film on the inside, started to smell gross after a few uses (only water has been used), water started to have a metallic/rust taste to it, claims of keeping your water cold are not entirely true, it'll keep it cool but not for the entire day (still better than other bottles though). I had high hopes due to all the overly hyped reviews, but overall it's just an ok water bottle. Some of these people are ridiculous the way they act like this bottle is some sort of scientific breakthrough. I assure you it's not very revolutionary. Cost more than it should but the donation thing is a good cause. I hope the smell and taste go away after washing it with their recommended methods. I'd probably still buy another one since it does hold water nicely and looks cool doing it.

Posted by Shannon on 03/14/2014

5 Star Rating

Worth every penny

Exceptional product. My experience is limited to cold drinks, but what I can say is that it keeps ice far longer then they tell you and liquid wonderfully cold well after the ice is gone. Additionally, not only can I go back to it 2 or 3 days later, and find cool water, but the taste of the water is still superb! My wife nearly fell over when I told her what I paid. 1 month later, we've purchased 2 more. And by we, I mean her... I'm still waiting for the, "you were right dear"... at least I will have cold water to drink while I wait. Buy one!

Posted by R. Taylor on 03/14/2014

5 Star Rating

Amazing quality, great function

This is the best water bottle I have ever owned. The quality is amazing; so well built. It is quite lightweight considering the steel construction. The best part is the vacuum-sealed insulation. It keeps my water ice cold all day long at work. I plan on getting a smaller size for greater portability soon. I can't remember being this excited about a new product in a long time, especially something as "boring" as a water bottle! So glad that I bit the bullet and paid the $35 at REI. It seemed expensive at the time but I now feel it was worth every single penny! Thanks for building an awesome, high quality product.

Posted by Olen Pepple on 02/24/2014

5 Star Rating

40 oz Water Bottle

This is the best water bottle I have ever owned. The straw lid does a great job, very easy to drink from in the car or at my desk. Totally seals, leak free. Wish I had stumbled onto Hydro Flask a few years ago before I invested in all the other bottles that either broke, leaked or didn't work well at all. I would also like to say that the customer support at Hydro Flask is some of the best you will ever deal with, their goal is to make the customer happy and they do, they are polite, cheerful and courteous, a pleasure to deal with and they stand behind their produce 110%.

Posted by Gretchen on 02/06/2014

5 Star Rating

Best Water Bottle Ever, regardless of cap!

I received the 40 oz. bottle for Christmas and have bought two more since. I fill it with ice and water at 7am and still have ice at 7 am the next morning! This bottle doesn't sweat and with all of that ice, it doesn't even get cold on the outside. Will never buy any other type of water bottle. The cap's strap that holds it to the bottle is the only problem, as it is splitting, but will not stop me from buying this product again. LOVE IT!!!!

Posted by Steve on 01/31/2014

1 Star Rating


Alright so I bought this because of the subzero weather in the Chicago area and the supposed time frame this kept things hot/cold. I can put the hottest coffee imaginable in this thing and within 2 1/2 hours, without opening, it is already cold. That is nearly 10 hours less than they claim. My hydroflask isn't left outside in the cold but you would think it was. TERRIBLE

Posted by Sarah on 01/13/2014

4 Star Rating

AMAZING water bottle, horrible lids!!!

I bought a 40 oz for my husband and one for myself as well! They don't sweat, they stay cold pretty much forever and I've never had an issue with it. Love love love!!! Now... the caps, really need to be redone in my opinion. My husband's strap broke on his cap within a week of him having it. Mine broke within a month of having it :( I ordered 2 replacements and am also expecting to get 2 more for free because of the lifetime warranty! If you want to have a back up for caps, order it NOW so you will get it a month or a month and a half later. I ordered ours on 12/24, it is now 1/12 and we are expecting to get them tomorrow. Yes, there were holidays in there, but I ordered something a week AFTER that and still got it way before these caps. Their shipping is horrid, as well as the caps but I will never buy anything else!!! THE best water bottles on the market.

Posted by Jenn on 01/03/2014

5 Star Rating


Well I am a self proclaimed waterbottleaholic! For the 40oz hydro flasks! Long story short I got it I am so in love with it in the 2 weeks after Christmas I have already had 3 friends order one! They are great! So great that I am no longer a waterbottleaholic I gave away all 23 of my water bottles! I am now a Hydroflaskaholic!!! Get it you won't regret it!

Posted by Michael Campanello on 12/28/2013

1 Star Rating

How Do They Stay In Business???

This company makes the absolute best 5 star rating thermal bottles on the planet. I have purchased over 20 of these bottles for myself and for giving as gifts. So why the 1 star rating? They're always out of stock on their own product. When they first came out with the wide mouth, pop-up straw cap, thank goodness I bought four of them. They have been "Out Of Stock" on this item for at least 6 months. They claimed that even they didn't realize what a big hit this cap would be. But come on...if they started to build a new factory for manufacturing lids on the day they ran out of them, the new factory would be built already. I realize that other companies such as Amazon.com carries this product, but even they are running out. In the past, I have purchased many of the 18 oz. wide mouth bottles and given them out as gifts to my coffee/tea drinking friends. Sometimes, I've even bought the bottles in colors that I didn't like because my preferred color was out of stock...just because they are such great bottles. Now that I need two more, they've been out of them in every single color for months. There seems to me that someone at the top is asleep at the wheel. This is a great business with a great product that is being run by somebody that seems to be really incompetent. I may have no expertise in business management, but I will tell you this...I don't know how to play the piano either, but I can sure as hell tell if you can play one or not. C'mon, folks...Most businesses with overstocked warehouses could only wish to have the demand for their products that you guys enjoy. But if you don't start filling orders, eventually even your most loyal customers, such as myself, are going to go away.

Posted by Fran Gonzaga on 12/24/2013

3 Star Rating

Sweats when it say Does not.

I got my first Hydro flask 2 months ago and loved it. It was the 64 oz. Loved that it kept my cold drinks cold for long period of time and my coffee hot for almost as long. But it was to heavy to carry all the time so my husband bought me a 40 oz classic stainless wide mouth. My coffee only stays hot for a couple of hours and my cold drinks it sweats after 2 hours. My husband took it with him hiking up Haleakala Maui and was disappointed for he had sweat/wet his backpack and was not as cold as he thought it would be. On hot days my cold drinks get hot and watery for the ice melts pretty fast.

Posted by David Dean on 12/23/2013

5 Star Rating


I volunteer with Teton County Idaho SAR and I take the 40oz bottle with me on every call out. This is the best water bottle I have used, and believe me I am a gearhead of the third order. I have a bone yard of bladders and assorted water bottles. NEED TO HAVE A YARD SALE!!!. This bottle works as advertised, keeps thing HOT and keeps things cold. What else can I say, and I am not a PAID spokeperson!!. EXCELLENT PRODUCT

Posted by Natalia Martinez on 12/11/2013

2 Star Rating

Flat cap didn't last

I bought for my husband's B/day one of this bottles. He is a Zumba instructor, so I wanted a long lasting product for him. I gave the bottle to him on nov 22, and the holder of the flat cap did not last even a month!

Posted by Eden on 12/05/2013

5 Star Rating

BEST Water Bottle EVER!!!!!!

You may think this is an exaggeration...but I LOVE this water bottle and could not be happier with it. I am one of those "water snobs" who needs to have my water ice cold to drink it. I have a desk job so usually I am transferring my waterbottles in and out of the freezer all day...and just when I go to drink it I realize it's warm....UGH!!! Well, that NEVER happens with the Hydroflask. I fill it about 3/4 of the way full with water, put icecubes the rest of the way up at 7 am and even if I refill my Hyrdoflask the ice cubes are still there....and when I checked again at 5 pm...still icecubes!!! Maybe a little smaller than before but not fully melted! I was shocked and in awe!! LOVE LOVE LOVE LOVE!!! I also bought the 18 oz tea hydroflask and it keept my tea piping hot from when I put it in at 7 until I finally was able to take of sip of it at 11. BEST WATER BOTTLES EVER!!!!!!

Posted by JJ on 11/26/2013

5 Star Rating

My first

The 40oz was my first Hydroflask. I now own three and am always looking to add to my collection. I tell everyone I know about Hydroflask. I've been known to show them off to strangers. Thank you Hydroflask for making my life complete with regards to hydration and caffination!

Posted by Mark, CA on 11/18/2013

3 Star Rating

Excellent product, but poor cap

Outstanding product except for the cap. Dropped mine today (and was bummed!)and destroyed the cap. I understand that one isn't supposed to drop them, but in real life, things happen. I work in some high heat places and this keeps water cool on the hottest days. The replacement cost of the cap is reasonable, but if the cap were built as well as the container, you would never consider another product after trying this one. So, dear Hydro Flask, please consider a better design for the cap!

Posted by cf on 11/08/2013

4 Star Rating

almost the perfect bottle

overall this is a great bottle, but just shy of perfect. in my experience it only keeps liquids hot for about 6-8hrs, not the 12hrs listed on the product description. i've put boiling water in it in the evening so that i could have warm water to drink first thing in the morning without having to wait for the kettle but after 8hrs the water was back to room temperature. if opening the bottle to drink frequently, it naturally holds the temperature for even less time. the cap could also use some improvements. the plastic ring attaching the cap to the bottle broke within a few days of purchase, and then snapped off entirely a few weeks later. after about three months the rubber grip around the cap began to stretch and slip out of it's groove.

Posted by PortlandHiker on 11/07/2013

4 Star Rating

cap is definitely the weak point of a great bottle

I purchased 2 40oz wide mouth insulated bottles and absolutely am sold--wonderful product. However, in 3 months I've gone through 2 caps. On one, the lanyard snapped for no apparent reason and the other cracked after what I would consider to be a fairly mild drop. For comparison, I know my Nalgene lid wouldn't have broken under the same stress. Still a great product--just redesign with a better lid system and we'll be good to go.

Posted by Larry Turner on 11/03/2013

5 Star Rating

Do you Bikram?

Do you bikram? You NEED the 40oz HydroFlask! Awesome!

Posted by Cathy Ramous on 10/15/2013

5 Star Rating

Bring It Anywhere

I take my 40 oz everywhere! It's great for taking to the office, gym, yoga - wherever. And the straw lid for one handed access!

Posted by Art on 10/10/2013

5 Star Rating

Love it

This is the best flask ever!

Posted by SSG John T. on 07/07/2013

5 Star Rating

Its military tough...

I've had my 40oz for a couple years, and the last 8 months of that time has been spent in southern Iraq and northern Kuwait on my second deployment. It reaches 125' F here on a regular basis during the day, and 100'F at night. A regular plastic bottle of water only stays cold(ish) for about 10 minutes. Not the Hydroflask. I can fill it up with ice top it off with gatorade and head out on patrol. 5 hours later, and there's still some ice left floating even with it sitting in direct sunlight. Its really a nice piece of gear to have and really makes a difference on long combat patrols. Thanks Hydroflask for a solid piece of equipment that will last for many years to come. (Side note: the paint will scratch off, and the sides will dent, but even bouncing around the inside of a HMMWV for a couple hours doesn't hurt this thing too much.)

Posted by April Govednik on 06/26/2013

5 Star Rating

10 Reasons Why I Love my HydroFlask

1. Doesn't sweat so there is no mess 2. Ice Ice Baby! Ice still present after 16 hours 3. 40 ounces! Holy moly, that's a lot of water 4. Orange Zest is a fun color that I've yet to see anywhere else 5. Super durable! I've dropped my HydroFlask a couple of times and you'd never know it! (Unlike the Nalgene that took a tumble down a mountain) 6. Great company that gives back 7. Bottom doesn't bow outward like other (cheap) stainless steel bottles 8. Cap options- love the cap that comes with the bottle but will be purchasing the straw lid soon, which is a great price 9. Easy to clean and doesn't get a weird taste like the Nalgene did 10. Lifetime Warranty that truly is for a lifetime

Posted by Robert5 on 05/29/2013

5 Star Rating

Perfect Thermos for Denali Expedition

Confession: This spring, I spent waaaaaaaay too much time comparing thermoses (even going so far as to doing temperature testing with a thermometer and freezer one day). But in the process, I discovered that Hydroflask had far and away the best product on the market, keeping my drinks hotter for longer. The definitive proof came on Denali this spring. On summit day, I filled my Hydroflask with hot water, carried it up to the base of Pig Hill, and left it in my backpack for a few hours while I summited. The temperature, with wind chill, was -40F. When I came back, I still had warm water!

Posted by Dexx on 03/19/2013

4 Star Rating

Proof is always in the pudding!

I'm on my second 40oz. flask not because something is wrong with the first one but because my wife "adopted" it! I live in Arizona, it's f/n hot most of the time. I am a photographer that carries 20-30lbs. of extra gear on hikes, climbs, singletrack, and regularly escape the heat into below freezing alpine conditions. Suffice to say water is no good to me if it spills from a broken container along the way. The pile of non functional bottles I've left in my wake is neither cheap nor sustainable. The build quality is clean and logical, no silly features that were thought up to market the product. The "features" of this bottle are that it works, and takes a beating if need be. Thanks, much love!

Posted by LeAnn on 01/28/2013

5 Star Rating

The Best Ever

I read about this water bottle from a friend who posted it on Facebook. He spoke his water still being as cold as when he filled the bottle 7 hours later. I thought there was no possible way and had to try for myself. This is the best water and coffee bottle hands down. I can not beleve the water is still as cold 10 hours later when I drink in no matter what the weather is outside. The coffee stays the same way. The other thing when you drink out of the stainless steel water bottle is does not taste like you are drinking a bottle of metal. I can not say enough about this water bottle. I am so impressed, I have more then one. On top of this they stick true to their customer service and replaced a broken top I had with out question. What a great product and and super company based in the USA.

Posted by RL on 01/28/2013

4 Star Rating

Ideal for a variety of settings!

I got the 40oz bottle as a present and am extremely impressed with its performance. I loaded it up at 7am with hot cocoa, and after ice climbing in 0 degree temps for 10 hours, the contents of the hydroflask were just as warm as in the morning! More heat is lost while drinking for 30 seconds than in 3 hours of sitting around closed. Couldn't have asked for a better thermos!

Posted by bourbour on 01/04/2013

5 Star Rating

Most Amazing Water Bottle You'll Ever Find

This has to be the most fantastic water bottle on the market. The exterior coating allows for no sweating during transportation. I fill this bottle with ice and water around 6:30 in the morning, and by 8:30 pm there is still ice left so I can replenish with water. Brightly toned, and eco-friendly this is a definite to insist on for your must-have-list.

Posted by B on 08/10/2012

5 Star Rating

BEST Water Bottle EVER

I've purchase soooo many water bottles and the last one I had was a 32 ounce camelbak with a sport spout which I loved. Only problem? Condensation when filled with ice and water getting warm on hot days. Problem solved with the hydro flask. I remember seeing it at Saturday Market in Portland and decided to purchase one during the hottest day this year. Absolutely LOVE it. I got the 40 ounce steel one and it does keep things cold even when left in a hot car. I can even use the sport cap on my camelbak on this one so I don't need to open and close a lid which is super convenient and I haven't notice a temperature problem because I'm usually needing a refill by the time I get home.

Posted by B on 08/10/2012

5 Star Rating

BEST Water Bottle EVER

I've purchase soooo many water bottles and the last one I had was a 32 ounce camelbak with a sport spout which I loved. Only problem? Condensation when filled with ice and water getting warm on hot days. Problem solved with the hydro flask. I remember seeing it at Saturday Market in Portland and decided to purchase one during the hottest day this year. Absolutely LOVE it. I got the 40 ounce steel one and it does keep things cold even when left in a hot car. I can even use the sport cap on my camelbak on this one so I don't need to open and close a lid which is super convenient and I haven't notice a temperature problem because I'm usually needing a refill by the time I get home.

Posted by Elle Jones on 07/20/2012

4 Star Rating

Best Flask ever minus the top

I stole this flask from my husband months ago and I have had it ever since! I love the way that I can have ice still in the flask from the time that I fill it in the morning, and I don't need special ice cubes for it! The tops can't take the abuse, but I will definitely be purchasing a new one....I may even replace the one I boosted from my hubby!

Posted by LC on 07/11/2012

3 Star Rating

Broken Cap-

Awesome canteen / thermos -- Dropped it from 2' (full of water) cap cracked :( Replacement seems cheap enough-- but come on guys-- beef up your caps!

Posted by Bryce F on 06/27/2012

4 Star Rating

Love their products but they need tops that are a bombproof as the bottles

I have owned 7 hydro's in the past 4 years and love everyone of them, but i have broken 2 of the 400z widemouth tops and 1 of the 24 narrow mouth tops, Im may just be hard on my gear, but I'd love to see them come out with stainless tops as well

Posted by Tom Sadley on 04/03/2012

5 Star Rating

Eco conscious awesome product!

I seldom write any product reviews, but I love my 40oz. Hydroflask so much I had to tell you how much I am loving it. I am a student and I used to lug water bottles around which turned warm by mid-day. That is until I got my Hydroflask. It is wonderful how cold it keeps my water throughout the day. I also love how eco-conscious your company is, and how the bottle is BPA free. Thanks for a great product! It is one of my best quality purchases in a long time.

Posted by Claudia on 02/22/2012

5 Star Rating

Great Bottle! Great Performance!

Ok, I bought the 40 oz. Wide Mouth in Acai Purple, and thought I would test it out for myself. What a product! Performed better then expected! I did the test with hot liquids because it seems most people have tested the performance of cold and not hot. To give some examples to compare to, the bottle sat in a room that was 20 degrees celsius (68F). When I make tea or coffee, it starts at a temperature of 62.7 degrees celsius (145F). Start 2:20 pm: 95.5C (204F) 6 hours and 23 min later at 8:43pm: 71C (160F) 9 hours and 13 min later at 11:33pm: 63.8C (147F) 16 hours and 51 min later at 6:51am: 50C (122F) So after 9 hours the water in the bottle was still warmer then any coffee or tea that I would consume! Even the next day, 16 hours later, the water was still very warm! Can't wait to take it up skiing!

Posted by R B on 02/14/2012

5 Star Rating


Went through a ton of bottles before i heard about this one. My water stays icy cold in the heat of the bikram hot yoga and doesn't leave a big sweat puddle either. It still has ice the next day to, can't say enough about these amazing bottles.

Posted by R B on 02/14/2012

5 Star Rating


Been through every bottle on the market when a teacher told me about this. Got one on a trip to the US and couldn't believe it. My water stayed icy cold in 104 degree heat for hours and didn't leave a big sweat stain on the floor either. And still has ice in it the next day. LOVE it! Can't say enough about these amazing bottles.

Posted by C. Durkin on 01/13/2012

5 Star Rating

Great for athletes!

As an athlete, I've received or bought enough water bottles to fill a whole cupboard, and now all I need is this one Hydro Flask. It holds enough water for my practices and day-to-day hydrating! With its lifetime guarantee, I'll be able to make more room in kitchen and get rid of all of my old bottles.

Posted by Adam the Ukiltitarian on 09/06/2011

4 Star Rating

Finally a big enough bottle

After dealing with hard plastic bottles and hydration packs, I desired something with a man-sized capacity while still good for general use. After owning a 24 oz I was very happy with this, but I still wanted a larger size. This 40 oz in classic steel was the answer!

Posted by D. C. on 08/07/2011

5 Star Rating

Best water bottle EVER!

I am so glad that the folks at EMS brought this bottle to my attention! I've used several different kinds of water bottles in the past but this is by far the best. It is big enough to hold plenty of water to get me through my work day, and by adding ice in the morning it stays refrigerator cold! At first I thought it was a bit pricey, but it has been worth every penny. I don't leave home without it!

Posted by Clinton on 07/27/2011

5 Star Rating

Does exactly what it's suppose to do.

Finally received my 40oz hydro flask yesterday. I put water and ice in it at around 4:30 PM. The next day at 4:00 PM and there is still ice in it. The temperature where I work was 96 degrees today and the flask was with me the whole time I was working in the heat. I am very impressed with this product and highly recommend it.

Posted by Sarah Durban on 04/07/2011

5 Star Rating

I love this bottle!

My new 40oz Black bottle was delivered to my front door yesterday, and I'm so excited! I love my smaller Hydro Flasks but i think this is my new favorite. I'm gonna put it to the test this weekend, but it's already doing everything I could ask of it. My water has been ice cold since yesterday!