40 oz Wide Mouth

40 oz Wide Mouth Acai Purple
40 oz Wide Mouth White
40 oz Wide Mouth Black
40 oz Wide Mouth Stainless
40 oz Wide Mouth Everest Blue
40 oz Wide Mouth Green Zen
40 oz Wide Mouth Orange Zest
40 oz Wide Mouth Pinkadelic
40 oz Wide Mouth Lychee Red

40 oz Wide Mouth


Availability: In stock

  1. 3
  2. 2
  3. 1


Additional Caps & Lids
Additional Caps & Lids:
  • Wide Mouth Straw Lid$6.95

    Wide Mouth Straw Lid



Free Shipping on all orders of 2+ Flasks, Growlers or True Pints

Or purchase via one of our dealers:

rei backcountry moosejaw

Drench your thirst.

This is one of the largest bottles we sell, making it the ideal hydration companion for those long days in the office or a full day on the beach or trail. Stay cool and hydrated all day long, no matter where your adventures take you.

    Unique Product Benefits

  • Large water bottle for longer adventures
  • Less refills = more refreshment at hand
  • Fits most backcountry hydration filters
  • Universal Benefits

  • TempShieldTM Protected
  • Keeps cold up to 24 hours
  • Keeps hot up to 6 hours
  • 18/8 Pro Grade Stainless Steel
  • BPA-Free and Phalate
  • Durable, sweat-free powder coat finish (or our Classic Stainless option)
  • Lifetime Warranty
  • Compatible with Wide Flat Cap, Hydro Flip Lid and Wide Straw Lid
40 oz Wide Mouth is rated 4.8205 out of 5 by 39.
Rated 4 out of 5 by from Tighten Twice for Hot Liquids! Great bottle - Has kept tea hot, like burn your lips hot, for over 8 hours in an outside pack pocket while in the alpine zone at -15F in the White Mountains. Would be a 5 star product except the top WILL leak if you don't tighten, tip bottle to make sure hot liquid is in contact with the plastic top, wait for the lid to heat up (bottle will start to leak), and then retighten. After that there is no leak problem. This is just a fact of physics - the plastic cap has a higher coefficient of thermal expansion than the stainless steel bottle - so there isn't much that can be done about it, but this limitation should be noted to purchasers.
Date published: 2015-10-15
Rated 5 out of 5 by from Amazing product I bought the Arctic white 40 oz flask directly from Hydro Flask's Amazon account (there's a slight discount if you purchase directly from their Amazon account and free shipping, if you have Amazon Prime). Plus, if you have Chase Freedom, there's 10% cash back right now, so win win. On to the review.. I bought the flask two weeks ago and I'm so glad I did. I always always hesitant because of its high price tag, but my friends kept insisting that I get one for myself. After a couple months of being envious, I decided to jump the gun and buy one for myself. I'm super happy with my purchase. The flask keeps liquids cold for long durations of time. I was sold the first time I used it. I loved it so much, I went ahead and got the 40 oz stainless steel flask for my boyfriend. He too is on the Hydro Flask bandwagon. Best. Bandwagon. EVER. I also like that Hydro Flask donates 5% of all purchases made to YOUR CHOICE OF CHARITY. You just have to find the serial number on the flask label, and fill out the donation form (name, product name, place of purchase and serial number) and at the end, they'll give you a list of organizations you can donate to -- The American Red Cross and The American Cancer Society, just to name a few. Awesome product, amazing cause!
Date published: 2015-12-03
Rated 5 out of 5 by from The BEST bottle I've had this bottle in rugged desert terrain, high mountains, and everything in between - IT. IS. THE BEST. It kept ice in my water for 24 hours in 110deg heat, bouncing around an offered vehicle. It kept my mocha hot in -10deg for 8 hours. I've never seen a water bottle this good - it's also pretty light weight and tough. It's taken drops and dings on sharp rocks and the seal has held. There's still some work to be done on the flip up straw lid (rubber can get a little chewed up), but the bottle itself is second to none. Must buy for anyone looking to keep a drink cold/hot in extreme weather during extreme activities!
Date published: 2015-09-02
Rated 5 out of 5 by from In Love! #bestbottleever My husband bought this for me as a gift. First thought...what am I going to do with a 'flask'? I had no idea what this product was. I am in love! This is the best thing ever! Keeps my water ice cold forever! The ice remains for days...literally. Plus, it doesn't sweat, which is a huge deal. Definitely buying some as Christmas gifts so others can share the joy of owning one! :) Love the pink color and even better with a monogram, of course!
Date published: 2015-09-01
Rated 5 out of 5 by from Hydro flask has saved my life! I have a rare disease that requires me to stay very hydrated, otherwise I pass out/ get dizzy spells. This water bottle has become essential to my daily life routine. I used to not drink anything because I did not like the funny taste water bottles left behind or the luke warm temperature they were kept at but my Hydro Flask does the opposite! It keeps my water ice cold all day, I put 10 ice cubes in the 40 oz bottle and refill it 3 times a day with semi chilled water. It keeps coffee hot in the winter as well! It is very durable, I dropped it out of my truck the other day and a small dent appeared. You can barely even see it. I love it so much and am so thankful to have it every day I drink from it.
Date published: 2015-08-16
Rated 5 out of 5 by from Outstanding!! I bought this product not really knowing what to expect. I wanted something to go with me on my cruise to the Bahamas. On my vacation I would fill it about 3/4 with ice and then fill it with water. Thoughout the day I would refill it, and there would STILL be ice in it!! Even after a 10 plus hour day and being in direct sunlight for long periods of time. I can honestly say that I will never use another water bottle again!!! This product is absolutely amazing and has now become apart of my everyday routine! The straw lid is also a great addition to have!
Date published: 2015-08-26
Rated 3 out of 5 by from Keeps my water cold in the Hawaii sun! I bought this a while back and I am quite please with the performance! I live in Hawaii and I work in the hot sun all day and my water is super cold! The only problem I faced is that I noticed rust inside of my flask which is quite unusual.
Date published: 2015-08-30
Rated 5 out of 5 by from I'm Impressed Four months ago I purchased the Pinkadelic 40 oz wide mouth flask from the Bikram Yoga Midtown Detroit studio where I practice. The first time I used it, I filled the flask completely w/ice then water at 5:30 am and off to yoga class where the studio is heated to a sweltering 105° plus 40% humidity for 90 minutes and drank all my water. Refilled my flask with water for 8 hours using the same ice from 5:30am. I was impressed to see ice cubes in my flask at 5:30am the next morning! Of course this thing is heavy with ice & water so now I use it as an arm weight. LOL! I've purchased two more for coworkers and I'm going purchase the 12 oz to fit in my purse.
Date published: 2015-12-11
  • 2016-02-10T08:59CST
  • bvseo_cps, prod_bvrr, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasreviews, tv_0, tr_39
  • loc_en_US, sid_W40, PRD, sort_relevancy
  • clientName_hydro-flask
Q & A

I use this for hot tea. It's seems the bottom inside has came lose or it clicks any thing I should worry about? Should I use this for hot tea? If so how long can it be used?

Asked by: mario
Hello, Thank you for the concern. You can use the flask for hot and cold beverages. Please visit our warranty page at hydroflask.com so we can better assist you with the issue. Cheers!
Answered by: Hydro Flask Customer Team
Date published: 2016-01-29

I'm considering the 40 oz. or the 32 oz.  which do you recommend?

Asked by: ibgirl98
Hello, We would love to assist you with a recommendation! Our Wide Mouth 32oz Hydro Flasks are one of our highest purchased item. Both the Wide Mouth 40 oz and 32 oz are the same width in diameter. The Wide Mouth 40 oz is 1.5 inches taller in height (not including the cap). I hope I was able to provide you with some helpful information between the two flasks! Good luck with your purchase. Cheers!
Answered by: Hydro Flask Customer Team
Date published: 2016-02-07

Do you produce/sell or know where I can buy a neoprene or equivalent sleeve to help protect my hydroflask from knocks and dents?

Asked by: Sway
Hello, What a great question! There are many customized sleeves you can find. Feel free to check out one of the resource links below! http://www.amazon.com/NEOSLING-Adjustable-Neoprene-Bottle-Holder/dp/B004VA9UPG http://www.amazon.com/Onoola-Silicone-Sleeve-Bottles-Multiple/dp/B015X3D1L8 Happy Hydrating!
Answered by: Hydro Flask Customer Team
Date published: 2016-01-27

Does the 40oz wide mouth flask fit in a standard size car cup holder?

Asked by: She kayaks
No, it does not.
Answered by: Cattack
Date published: 2016-02-07

are they dishwasher safe

Asked by: duckdog
Nope! Check out why here: http://www.hydroflask.com/caring-for-your-hydro-flask/
Answered by: Hydro Flask Customer Team
Date published: 2016-01-20

I've seen posts about this bottle being heavy. I'm thinking about climbing Kilimanjaro next year and looking for gear. Need to be as light as possible. Can you tell me how much the bottle weighs empty please? 

Asked by: jbarnes2010
The 40 oz Hydro Flask weighs 17.6 oz. For our dimensions visit our FAQ page: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2015-11-27

Does this size bottle 40oz fit in a standard cup holder in a car?

Asked by: Sharonf
The 40 oz is 3.56 inches in diameter. This is usually bigger than most car cup holders. For our dimensions, visit our FAQ page: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2015-11-27

Does the 40 oz hydroflask fit into a bike water bottle holder (bike care, or rack) to be able to mount on the bike for rides

Asked by: Anchor Step
For more information on our dimensions, see our FAQ page: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2016-01-20
  • 2016-02-10T09:16CST
  • bvseo_cps, prod_bvqa, vn_cps_3.1.6
  • cp_1, bvpage1
  • co_hasquestionsanswers, tq_58
  • loc_en_US, sid_W40, PRD, sort_recentAnswersFirst
  • clientName_hydro-flask

Product Tags

Use spaces to separate tags. Use single quotes (') for phrases.