21 oz Standard Mouth w/ Sport Cap
$26.96
Regular Price $35.95

21 oz Standard Mouth w/ Sport Cap

21 oz Standard Mouth w/ Sport Cap is rated 4.4 out of 5 by 548.
  • y_2021, m_1, d_14, h_16
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.12
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_548
  • loc_en_US, sid_S21ST, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_hydro-flask
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getAggregateRating, 90.17ms
  • REVIEWS, PRODUCT
$26.96
Regular Price $35.95
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.

Hydration on the go
21 oz Standard Mouth Bottle w/ Sport Cap | Hydro Flask
Product image
add to cart
Features
Back to Navigation

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.

Proprietary Powder Coat
Details
Back to Navigation

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
Back to Navigation
Lifetime Warranty
Lifetime Warranty

We stand behind our products.

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

Back to Navigation
https://www.youtube.com/embed/SKjnrvgz-UY?rel=0&enablejsapi=1
Let's Go!

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

#HeyLetsGo

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.
You May Also Like
  1. $17.48
    Regular Price $34.95
    Hydro Flask Small Tag Along Bottle Sling - Goldenrod
    Colors Available
  2. $7.46
    Regular Price $9.95
    Standard Mouth Flex Cap - Black
    Colors Available
Back to Navigation
Reviews
Rated 5 out of 5 by from Love it! I own several different sizes and love them all!! HydroFlask is a great product!!!
Date published: 2020-11-06
Rated 5 out of 5 by from Keeps drink cold and easy to carry I bought the smaller 21 oz hydro so I could carry it when I’m walking or jogging Nd any other also fits in my stroller’s and car cup holder. Love the color as well! I did buy an aftermarket boot for it since this one did not come with one. The sport top works well for me and I can always I unscrew the top if I don’t want to use the sport top. Also no leaking and I do carry this inside my bag at times and not always upright. Great buy!
Date published: 2020-11-05
Rated 5 out of 5 by from Great features This is perfect for working out. I love it and use it all of the time.
Date published: 2020-11-01
Rated 5 out of 5 by from Keeps water cold I use this bottle everyday. I add ice each morning and fill with water. As the day goes on I add more water and never need more ice. Great look too. My husband has a boot on the bottom of his and I hope to purchase one for my bottle too.
Date published: 2020-10-26
Rated 5 out of 5 by from BEST BOTTLEE ER Bought this two months ago! Easy to wrap my hand around it! Even with the boot it fits in my vehicle cup holder. 21 ounces! Has me drinking much more water. Doesn’t leak when I remember to close the spout! Easy to clean! Everyone compliments me on them- yes I said them! Bought two so I am never without a clean one. Might buy a third just to be sure! Thus will be the last bottle you buy!
Date published: 2020-10-24
Rated 5 out of 5 by from Love it! This is the 5th Hydro Flask I’ve bought and I’ve been beyond satisfied with each one. The Sports Cap is my favorite top by far.
Date published: 2020-10-19
Rated 5 out of 5 by from Does the job I bicycle over 20 miles every Saturday and Sunday. The Hydro Flask keeps cold water cold for the whole trip. When I leave it overnight, it’s still cold the next day.
Date published: 2020-10-18
Rated 5 out of 5 by from STOP RIGHT HERE! YOU WONT BUY ANY OTHER! I have tried many, many, many other water bottles..they leak, too big for most women to hold on to, and on and on. BUY HYDRO FLASK water bottle and you will never buy any other. I have two, so I can always have one in use. I walk every day and this goes with me! Yes they fit in my car cup holder! Couldn’t be happier!
Date published: 2020-09-30
Rated 5 out of 5 by from Keeps water cold This water bottle cap is a better quality than the others, it keeps water cold but unfortunately my daughter already lost interest in it and likes the $10 water bottle from target better. The quality is good but overpriced in my opinion.
Date published: 2020-09-24
Rated 5 out of 5 by from I love it It does not break it keeps my water cold and it is my favorite water bottle
Date published: 2020-09-21
Rated 5 out of 5 by from Perfect for school. I bought this a month ago for my daughter To use at school. It fits perfectly in her backpack.
Date published: 2020-09-18
Rated 5 out of 5 by from Love this! My daughter bought me one and I loved it so much, I bought everyone in my family one. We live in a dry area of the country and I love having ice cold water to keep everyone hydrated. And we don't use bottled water any more so no more piles of plastic bottles. Healthy for us and the environment!
Date published: 2020-09-16
Rated 5 out of 5 by from The color is awesome- keeps my drink ice cold I bought this to fit into my bike cage for long rides - and it certainly does the job
Date published: 2020-09-16
Rated 5 out of 5 by from My Wife Lives It! I bought the bottle and boot for my wife. She has always been jealous of me and my 21oz. HydroFlask. She has had other brands and has not been happy with them for one reason or another. She calls her new bright yellow HydroFlask, Perfect! Need I say more.
Date published: 2020-09-14
Rated 5 out of 5 by from LOVE LOVE LOVE This bottle is awesome! I LOVE the sport cap, it just leaks a tad, but no biggie! Always can count on my Hydroflask to keep my ice water, ice water!
Date published: 2020-09-14
Rated 5 out of 5 by from Lemon love Love lemon love the company. Quality product and the company cares about its customers. Important to still have a company and quality
Date published: 2020-09-13
Rated 5 out of 5 by from Loved it. Used it two days then lost it in a house fire.... ugh.
Date published: 2020-09-12
Rated 5 out of 5 by from Perfect for sports and school I bought this a few weeks ago right before school started and I’m so happy with it. My daughter gets so excited that her water stays cold all day at school! And the sport mouth is perfect for kids as well!
Date published: 2020-09-12
Rated 5 out of 5 by from Bottle I brought it for my sisters birthday and she loves it
Date published: 2020-09-10
Rated 5 out of 5 by from Love the color and the size One of many hydroflasks that I own. This one is perfect for my mini adventures.
Date published: 2020-09-05
Rated 5 out of 5 by from Amazing I’ve had this cup since Chrismas and it has no Detents or anything it’s is great condition highly recommend
Date published: 2020-09-03
Rated 5 out of 5 by from Ice cold always! I love this bottle and finally understand the hype. No matter where I am my water stays ice cold. I also love the sports cap!!
Date published: 2020-08-28
Rated 5 out of 5 by from a step above I bought 2 of these for my adult daughter and I. So happy I did, ice stays cold for more than 24 hours. Fits nicely in my car drink holder. The top is designed well and easy to grab with 1 finger and carry. I hesitated because it is a premium product which comes with a higher price but really the best thing for really ice cold water storage.
Date published: 2020-08-25
Rated 5 out of 5 by from Love the sport top, so easy to drink out of Couldn’t be more pleased , easy to drink and always cold
Date published: 2020-08-25
Rated 5 out of 5 by from Love the color and sport cap Perfect size for my daughters lunch box, keeps her water cold all day and the sport cap doesn’t leak and is super handy!
Date published: 2020-08-25
Rated 5 out of 5 by from The perfect bottle So happy with my purchase. Found my favorite color and it happened to be on sale. Keeps my drinks super cold and even when it’s all the way filled up it’s lightweight. Getting the sports cap was the cherry on top because i’m able to drink from it without taking the whole top off and i’m still able to carry it comfortably.
Date published: 2020-08-24
Rated 5 out of 5 by from Ice, ice, baby The ice can't melt in this thing! Makes a great gong noise when it bumps against things.
Date published: 2020-08-23
Rated 5 out of 5 by from Fantastic hydro flask This is an incredible bottle. Keeps water cold with just a little ice all day. Love love this water bottle. Worth every penny!
Date published: 2020-08-23
Rated 5 out of 5 by from Cold water—-finally! I bought my hydro flask about a month bag and I’m so happy with it. I’d tried other bottles that were supposed to keep water cold for long periods and was always disappointed. My hydro flask keeps my water cold all day long. I’m buying one for my daughter next!
Date published: 2020-08-21
Rated 5 out of 5 by from Awesome Love my hydro flask it’s a bright yellow and keeps my water icy.
Date published: 2020-08-20
  • y_2021, m_1, d_14, h_16
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.12
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_548
  • loc_en_US, sid_S21ST, prod, sort_[SortEntry(order=RATING, direction=DESCENDING), SortEntry(order=SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_hydro-flask
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getReviews, 2.79ms
  • REVIEWS, PRODUCT
Questions

My bottle has a rattle has something broken inside?

Asked by: Javo123
The rattle you hear is a small metal disc that sits between the double wall of your flask that aids in the vacuum insulation process. If the disc becomes dislodged, you&rsquo;ll hear a small gritty noise or rattle. This will not affect the insulation or structural integrity of your flask.
Answered by: Consumer Service
Date published: 2019-10-30

Is the sports cap easy to open? My mom has arthritis and is looking for a water bottle she use easily.&nbsp;

Asked by: Katieroo
When the sports caps are brand new, they can be a little hard to open and close. I would recommend a wide mouth flask with a straw lid.
Answered by: Consumer Service
Date published: 2019-10-29

what lids can be used with this bottle besides the sports cap and the flex cap?

Asked by: timmothy
The Standard Mouth Sports Cap and the Standard Flex Cap are the only caps available for the standard mouth flasks at this time.
Answered by: Consumer Service
Date published: 2019-10-27

Are you able to put ice cubes in the standard mouth bottle or is it to narrow for ice cubes to fit through the top?

Asked by: Caterina
Normal sized ice cubes will fit in the standard flask.
Answered by: Consumer Service
Date published: 2019-10-27

So this bottle works w both the sports cap and the standard sized screw able lid?&nbsp;

Asked by: Kayla14
Yes
Answered by: Consumer Service
Date published: 2019-10-27

Can anyone recommend a bike cage for this bottle? I tried a plastic one to hold the bottle but the bottle was too heavy for the plastic and broke. I now have a metal cage but the metal on metal makes a lot of noise while riding my bike.

Asked by: MikeB82
We regret to inform you that our products are not specifically designed to be carried in bike cages and they have not been tested for such use. We would be concerned about the possibility of the cage causing scratches, chips, and dents to your flask from improper fit and jostling. Therefore, we do not recommend carrying Hydro Flask products in bike cages.
Answered by: Consumer Service
Date published: 2019-07-14

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: 2020-07-28

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: 2020-07-28

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: 2020-05-13

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: 2020-11-14

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
  • y_2021, m_1, d_15, h_17CST
  • bvseo_bulk, prod_bvqa, vn_bulk_3.0.12
  • cp_2, bvpage2n
  • co_hasquestionsanswers, tq_80
  • loc_en_US, sid_S21ST, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
  • clientName_hydro-flask
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 61.25ms
  • QUESTIONS, PRODUCT

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.
You May Also Like
  1. $17.48
    Regular Price $34.95
    Hydro Flask Small Tag Along Bottle Sling - Goldenrod
    Colors Available
  2. $7.46
    Regular Price $9.95
    Standard Mouth Flex Cap - Black
    Colors Available