21 oz Standard Mouth w/ Sport Cap
21 oz Standard Mouth w/ Sport Cap is rated 4.4 out of 5 by 429.
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Regular Price $35.95
$26.96

21 oz Standard Mouth w/ Sport Cap

21 oz Standard Mouth w/ Sport Cap is rated 4.4 out of 5 by 429.
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Regular Price $35.95
$26.96
Size Chart
Hydro Flask Pack Size Chart
Available Sizes S / M M / L
Torso
Measurement
18 - 19 in 19 - 22 in
43 - 48 cm 48 - 56 cm
Hip
Measurement
22 – 46 in 26 – 46 in
56 – 117 cm 66 – 117 cm
  1. 1. Torso Measurement

    • A. Bring your chin to your chest and feel for the most prominent bony bump where the slope of your shoulders meets the back of your neck. This is your C7 vertebra, and the top of your torso measurement.

    • B. On each side of your body, feel for the top of your hip bones, just below the sides of your ribs. With fingers pointing forward and thumbs pointing backward, draw an imaginary line between your thumbs. This is the bottom of your torso measurement.

    • C. Stand up straight and have a friend with flexible measuring tape measure the distance between your C7 vertebra and the imaginary line between your thumbs. That’s your torso measurement. If you are between pack sizes, go with the smaller size.

  2. 2. Hip Measurement

    While your torso measurement is the best indicator of your pack size, it’s still important to check your hip size when using a hipbelt. To find your hip measurement, wrap a flexible tape measure around the top of your hip bones, just below the sides of your ribs. This measurement is slightly higher than your waistline

<h2>Hydration on the go.</span></h2> <p>They're pretty much the perfect pair—our 21 oz Standard Mouth Bottle and our insulated Sport Cap. Together, they're your go-anywhere hydration companion. It stashes easily in a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough to keep you going for hours without weighing you down.</p>

Hydration on the go.

They're pretty much the perfect pair—our 21 oz Standard Mouth Bottle and our insulated Sport Cap. Together, they're your go-anywhere hydration companion. It stashes easily in a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough to keep you going for hours without weighing you down.

21 oz Standard Mouth w/ Sport Cap Lifestyle Image
21 oz Standard Mouth Bottle w/ Sport Cap | Hydro Flask
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Features
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TempShield™

Our unique double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure.

TempShield
Pro-Grade Stainless Steel

Pro-Grade Stainless Steel

Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transfer - and the durable construction stands up for whatever life brings.

Proprietary Powder Coat

Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.

Cold Flow System
Details
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Product Benefits

  • Versatile, middle-of-the-road size, equipped with our insulated Sport Cap
  • TempShield™ insulation eliminates condensation and keeps beverages cold up to 24 hours and hot up to 12 hours
  • Durable 18/8 Pro-Grade Stainless Steel construction
  • BPA-Free and Phthalate-Free
  • Compatible with our Standard Mouth Flex Cap
  • Lifetime Warranty
  • Sport Cap is not intended for use with hot liquids and is not leakproof

Size & Dimensions

21 oz
Volume 621 mL
Mouth Diameter 1.91"
Diameter 2.87"
Height 10.4"
Weight 11.3 oz
Technology
Lifetime Warranty

We stand behind our products.

Hydro Flask guarantees this Hydro Flask product with a limited lifetime warranty against manufacturer defects.

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Today is wide open. You lead, we'll follow.

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Hydro Flask supports non-profit organizations focused on building, maintaining, restoring, and providing better access to parks. Since 2017, we have been doing just that:

  • 92 Non-profits supported non-profits.
  • $1.5 million Dollars donated donated.
  • 26,043 Bottles donated bottles.
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Reviews
Rated 5 out of 5 by from Love Drinking more water and love that it stays cold all day.
Date published: 2020-06-01
Rated 5 out of 5 by from Perfect My daughter wanted this. I love this lid. Easy and don’t have to take it off to drink. Good color and keep her water cold!
Date published: 2020-06-01
Rated 5 out of 5 by from Great color I bought this for a friend and she absolutely loved it. The color, size, quality and sports cap suited her perfectly.
Date published: 2020-06-01
Rated 5 out of 5 by from Great My daughters favorite !!!its her birthday gift she is loving it a lot
Date published: 2020-05-31
Rated 5 out of 5 by from very pretty quick, and easy transaction. just what i ordered love it
Date published: 2020-05-28
Rated 5 out of 5 by from Family loves their HydroFlasks Great gifts for teenage kids on the go. Keeps beverages very cold even while the hydroflask is sitting in a hot car.
Date published: 2020-05-24
Rated 5 out of 5 by from Best bottle Great for work. 12 hour shifts ice will last the whole day. Amazing bottle
Date published: 2020-05-22
Rated 5 out of 5 by from Amazing!!! I am so happy that I got this! The color is so cute.
Date published: 2020-05-22
Rated 5 out of 5 by from My FAVORITE Hydroflask! :) Ever since I was turned on to Hydroflasks (3ish yrs ago) - I have replaced ALL my drinking vessels with hydroflasks. Love them! But this new watermelon, 21oz, with boot and sport cap is my all time favorite!
Date published: 2020-05-22
Rated 5 out of 5 by from The only water bottle you need! Bought as a gift and was well received. They loved the color and how it keeps beverages cold. I like the sport top, easy to drink at soccer practice!
Date published: 2020-05-21
Rated 5 out of 5 by from Perfect This has been exactly what I was looking for: hiking and working in the yard. Keeps things really cold for 24 + hours.
Date published: 2020-05-20
Rated 5 out of 5 by from Great Item I bought this to insure cold water all day without having to refill with ice during the day and that is what it does. Good description and works great on walks and everything. Definitely would recommended!!!
Date published: 2020-05-10
Rated 5 out of 5 by from LOVE! I bought this a year ago in frost. It kind of worries me that frost is gone in so many water bottles, but Iim grateful for my amazing one. I use it all day, and it stays cool. Excellent quality!
Date published: 2020-05-09
Rated 5 out of 5 by from Perfect size I bought 2 and totally worth it.. keeps my water cold all day and it fits perfectly in my cup holder which is what I needed .. it’s sturdy and easy to clean
Date published: 2020-05-07
Rated 5 out of 5 by from Best purchase ever I bought this bottle after my other bottle was dropped on a cement floor and ruined. My hydro flask has certainly met and exceeded my expectations!
Date published: 2020-05-05
Rated 5 out of 5 by from A+++ for quality and customer service! I ordered this for a friends birthday and (SUPER understandable with everything that is going on right now) I received the wrong color/cap. Normally it would NOT have been a big deal and I felt like a jerk even saying something but I knew she was looking and wanted the sport cap specifically plus the color is her fave so I wrote them. They replied the next business day and before I knew it I had the replacement one with no issues at all. I was prepared to just purchase the new one and suck it up but I honestly can’t say enough good things about their customer service team. I’ve always heard such great things about their products and company...now, from experience, I know why! I might just be ordering one for myself now! Thank you!
Date published: 2020-04-30
Rated 5 out of 5 by from Ice cold drinks! I’ve bought 7 in the last two months, and I can’t wait to get two of the wine tumblers!
Date published: 2020-04-25
Rated 5 out of 5 by from Hydro Flask is thebest I love my hydro flask! I am nine years old. But my dad won’t let me take it to school so i am finding another one for school
Date published: 2020-04-24
Rated 5 out of 5 by from Love the color We bought this for our daughter for her Easter basket. She had a larger one before this one and wanted something that fit in her school backpack a little better. This is perfect. And the watermelon color is great.
Date published: 2020-04-22
Rated 5 out of 5 by from Gift for my daughter I bought this for my daughter, she has one but she really likes this color. She told me that she wanted another one because she uses them at school for cold drinks that last all day.
Date published: 2020-04-18
Rated 5 out of 5 by from Great! Love hydro flask! This is my 4th one! Would definitely recommend the sport mouth. Does not leak at all.
Date published: 2020-04-17
Rated 5 out of 5 by from Loving my new Hydroflask I bought my Hydroflask like a month and a half ago and it's an amazing water bottle, shipping was fast and I love the color that I got, it works perfectly with hot and cold things.
Date published: 2020-04-17
Rated 5 out of 5 by from amazing i got this for my birthday and i love it so much .
Date published: 2020-03-31
Rated 5 out of 5 by from Impressive insulating performance Very durable bottle; it has some heft to it and could probably be used as a weapon, should the need arise. The powder coat is nicely textured and has good grip. I carry this thing with me everywhere to make sure I'm hydrating properly and have even left it in my hot car only to be completely surprised that the contents were still cold. The sport cap is very rugged. The handle is extremely strong and I never worry about it breaking. The mouth piece is rubbery and soft, not hard plastic and things do tend to stick to it, like dirt, towel fibers, hair. It cleans easily though. Manufacturer claims that the lid is not guaranteed to be leak proof but I have never seen mine leak. It lays in the seat of my car without issue. The only minor thing I can complain about is the sound the cap makes when I drink. It is supposed to be a "whistle free" valve but mine makes a whistling gurgling sound every time. Its loud enough that people in the next room can hear it. Aside from that, I love it.
Date published: 2020-03-23
Rated 5 out of 5 by from Awesome water bottle By buying this water bottle you can change the world. There are tons of animal suffering from pollution and by buying this water can change everything
Date published: 2020-03-04
Rated 5 out of 5 by from I had great experience with this particular one I am so happy I got this bottle it is the best and it helps with everything I definitely recommend this
Date published: 2020-01-12
Rated 5 out of 5 by from AMAZING Product I got this for my dad for Christmas, he loves it so much and told everyone it was his favorite gift! WIN!!!
Date published: 2020-01-02
Rated 5 out of 5 by from They looks great my son love it I bought this for my son for Christmas he love it and carry everywhere he go.
Date published: 2020-01-01
Rated 5 out of 5 by from Great quality I put some ice cubes and water in my hydro and it stayed cold for 4 days.
Date published: 2019-12-29
Rated 5 out of 5 by from Great Works exactly like I hoped it would!!! Fits very well in my hand also.
Date published: 2019-12-29
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Questions

Is anything being done about the leaky sports lid? I wanted to get one for my husbands birthday.

Asked by: Princess Lu
If the cap starts to leak, we'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
Answered by: Consumer Service
Date published: 2020-06-17

I see several complaints about the sports cap leaking. I want a cap that you don't have to unscrew to drink from and need the standard size to fit into my cupholder. Anyone have good experience with the sports cap or recommendations for a different one?

Asked by: Lucy Lee
The Standard Mouth Sports cap is NOT advertised as leak proof, and there is potential for dripping if overturned or shaken. If transporting your flask in a situation where it may not remain upright or could be jostled, we recommend using a sealed lid such as the Flex Cap.
Answered by: Consumer Service
Date published: 2019-11-03

Do I need to purchase a straw for this water bottle or is the included sport cap all I need?

Asked by: ward
The sports cap is made to be tilted up to drink from.The product does not come with a straw included.
Answered by: Consumer Service
Date published: 2019-12-22

Does it have a straw in it?

Asked by: Soccergirl11
The Sports Cap just has the spout. It does not have a straw in the lid.
Answered by: Consumer Service
Date published: 2019-05-31

Which bottle best fits into a bicycle water bottle cage holder? Could you please include photos of bicycles with a hydroflask in the bottle cage? It would be so much more helpful than your standard response to this question on the FAQ page.

Asked by: SLuke
I use the 21 oz bottle with the flex cap in my bike holder and I believe the 24 oz would also fit since it&rsquo;s just taller.
Answered by: Kim99
Date published: 2019-05-07

I&rsquo;m planning to order a hydro and would love to put stickers on it. What is the area of this hydro so I&rsquo;ll know how many stickers to order? Thanks!

Asked by: quinlan21
Quinlan21, Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: customer servcie
Date published: 2019-05-07

Will a straw lid be available for the 21oz HF?

Asked by: Haughtohio72
We do not currently manufacture a product that matches your request, but we&rsquo;ll document your suggestion for future consideration by our Product Development Team.
Answered by: Hydro Flask Customer Team
Date published: 2019-07-13

Why does it say the bottle will keep beverages cold or hot and then say hot beverages not recommended? I find this confusing and misleading.&nbsp;

Asked by: Rroy
The sports cap is what is not recommended with hot beverages. You can use the flask for hot and/or cold beverages, but the sports cap should not be used. You would want the flex cap.
Answered by: Hydro Flask Customer Team
Date published: 2019-10-18

Are your products made inUSA?

Asked by: Sherrill
We appreciate your interest in Hydro Flask. Our flasks are manufactured in China, and the caps are manufactured in both China and USA. If you have a specific question or concern, please reply with more detail and we'll be happy to assist you further.
Answered by: Hydro Flask Customer Team
Date published: 2019-08-24

Is the Hydroflask dishwasher safe?

Asked by: Grandpa
We do not suggest putting your flask through the dish washer. For cleaning, we recommend hand washing with a bottle brush and mild dish soap.
Answered by: Hydro Flask Customer Team
Date published: 2019-09-11

what is the diameter in inches of the water bottle mouth opening? would it fit a 2.5&quot; lid?

Asked by: makerra
Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2019-09-11

Can you use the sport top with hot liquids?

Asked by: hockeyplayer
No, it is not recommended.
Answered by: Hydro Flask Customer Team
Date published: 2018-01-17

do you have a straw lid that fits this 21 ounce sized bottle? &nbsp;It says only sport top and screw off fit but we'd like the straw for my daughter for school.

Asked by: Annamaria
We do not currently manufacture a product that matches your request, but we&rsquo;ll document your suggestion for future consideration by our Product Development Team.
Answered by: Hydro Flask Customer Team
Date published: 2019-01-10

will the top leak if it tips over in a bag?

Asked by: CGerman
The standard mouth flex cap will not leak. The sports cap will leak if it is not completely closed.
Answered by: Hydro Flask Customer Team
Date published: 2019-02-12

Do you make flip caps with straws for the 21 oz bottle?

Asked by: Leelah
We do not currently manufacture a product that matches your request, but we&rsquo;ll document your suggestion for future consideration by our Product Development Team.
Answered by: Hydro Flask Customer Team
Date published: 2017-08-01

why you not got straw mouths for the lil bottles? huh?

Asked by: leanbeanninja
We do not currently manufacture a product that matches your request, but we&rsquo;ll document your suggestion for future consideration by our Product Development Team.
Answered by: Hydro Flask Customer Team
Date published: 2017-08-01

I just purchased this water bottle with the sport cap (no straw). It makes a high pitched noise when I drink from it most of the time. I can't figure out why or how to make it stop making the noise. Any ideas?

Asked by: Lina81
We'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
Answered by: Hydro Flask Customer Team
Date published: 2019-08-05

I purchased a straw lid for my bottle. I cut the straw to fit but it doesn't get a suction, when I suck all I hear is air. How do I make it work? I checked the spot where the straw attach&eacute; and its on very snugly. Thanks&nbsp;

Asked by: Dianewilson
We'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
Answered by: Hydro Flask Customer Team
Date published: 2017-07-21

Can you please share height and diameter at wides point of this bottle. My new car's cup holders are ridiculously narrow. Trying to fine a bottle to work/fit.&nbsp;

Asked by: Tess13
Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2017-07-30

Why on earth does my sport cap make so much noise (air) when I try to drink out of it??? I barely get any water unless I tip it far back, and even then I get half air. What am I doing wrong????

Asked by: Amy J
We'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
Answered by: Hydro Flask Customer Team
Date published: 2017-07-30

I would like to buy 21 fl oz sport hydroflask for my road bike since I don't want to drink water out of plastic bottle. Do you think it will fit in the regular bike holder? Also, is it easy to drink out of it using just one hand?

Asked by: Lucia
Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2017-12-26

I dropped my 20 oz wide mouth bottle and dinged it on the bottom, so it now wobbles a bit when I set it down on my desk. Still works fine but it's annoying. Is that covered under warranty?&nbsp;

Asked by: BarbE
Accidental damage, dents, dings, scratches, etc. is not covered under the lifetime warranty.
Answered by: Hydro Flask Customer Team
Date published: 2017-12-26

I have a 21oz HF jug I need only a replacement top. Can I buy one [sport cap] from you? (btw - your 'Nickname' requirement is stupid and no I don't wanna be a member of a nickname club, thank you)

Asked by: KSTABER
We'd be happy to replace your cap for you under our Lifetime Warranty. You can fill out a warranty claim here: (http://www.hydroflask.com/warranty/)
Answered by: Hydro Flask Customer Team
Date published: 2017-05-19

What # plastic do you use on the flex cap? &nbsp;Thank you!

Asked by: Jmod77
It is plastic number 7.
Answered by: Hydro Flask Customer Team
Date published: 2017-05-12

With the Sports cap, will it leak all over my backpack because of the air hole?

Asked by: eeortiz
If the cap is not shut completely or it is on its side it does have the potential to leak because there is an opening in the cap.
Answered by: Hydro Flask Customer Team
Date published: 2017-05-05

Is the color tangelo closer to a shade of orange or could it be closer to a coral pink like color?&nbsp;

Asked by: Mmmmmmayra
It is more of an orange than pink.
Answered by: Hydro Flask Customer Team
Date published: 2017-03-28

PLESE list size/dimensions of each one OR list ounces on the actual bottles. I am having a hard time figuring out which size I need a replacement for since I'm not near a way to measure ounces.

Asked by: peaceful warrior
Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2017-07-07

What kind of Impact makes this unsafe for drinking use? I See that its thick and made to withstand a certain amount of a blow, just wondering when I should toss and buy new.

Asked by: andrew09
There is really no impact that would make it unsafe as long as there is no damage to the steel where pieces are sticking out. You can use the flask as long as it works. Usually dents and dings do not affect the insulation of the flasks, but if it stops working the way it was intended you can contact us and we can do a warranty.
Answered by: Hydro Flask Customer Team
Date published: 2017-03-09

Do any of the bottles fit well in a bike cage?

Asked by: NurseAR
Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2017-12-26

Do you make a flask with a smaller diameter than the 21 oz.?

Asked by: Obie
Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
Answered by: Hydro Flask Customer Team
Date published: 2017-07-30
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Hydro Flask supports non-profit organizations focused on building, maintaining, restoring, and providing better access to parks. Since 2017, we have been doing just that:

  • 92 Non-profits supported non-profits.
  • $1.5 million Dollars donated donated.
  • 26,043 Bottles donated bottles.
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