21 oz Standard Mouth
21 oz Standard Mouth is rated 4.7 out of 5 by 752.
  • y_2020, m_7, d_6, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.10
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_752
  • loc_en_US, sid_S21SX, 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, 4.33ms
  • REVIEWS, PRODUCT
$32.95

21 oz Standard Mouth

21 oz Standard Mouth is rated 4.7 out of 5 by 752.
  • y_2020, m_7, d_6, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.10
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_752
  • loc_en_US, sid_S21SX, 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, 3.77ms
  • REVIEWS, PRODUCT
$32.95
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>Your perfect travel companion.</span></h2> <p>Keep life moving with our 21 oz bottle and Standard Flex Cap. It stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough ice cold goodness to keep you going for hours without weighing you down. No wonder it's one of our bestselling water bottles.</p>

Your perfect travel companion.

Keep life moving with our 21 oz bottle and Standard Flex Cap. It stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough ice cold goodness to keep you going for hours without weighing you down. No wonder it's one of our bestselling water bottles.

21 oz Standard Mouth Lifestyle Image
21 oz Standard Mouth Insulated Water Bottle | 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.

Cold Flow System
Details
Back to Navigation

Product Benefits

  • Versatile, middle-of-the-road size
  • 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 Standard Mouth Insulated Sport Cap
  • Lifetime Warranty

Size & Dimensions

21 oz
Volume 621 mL
Mouth Diameter 1.91"
Diameter 2.87"
Height 9.4"
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.

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. Regular Price $7.95
    $5.96
    Small Flex Boot
    Colors Available
  2. Regular Price $34.95
    $17.48
    Small Tag Along Bottle Sling
    Colors Available
  3. $9.95
    Standard Mouth Insulated Sport Cap
    Colors Available
Back to Navigation
Reviews
Rated 5 out of 5 by from Great insulation I bought it about a month ago and I’m happy with the color :)
Date published: 2020-05-22
Rated 5 out of 5 by from beLLa/rYssa’S gReaT giFt I ordered this gift for my niece on her birthday and also got her sister one and two other products
Date published: 2020-05-21
Rated 5 out of 5 by from Great product Daughter so loves the new colors. Can't wait for school to start
Date published: 2020-05-20
Rated 5 out of 5 by from Present for a Friend I got this water bottle for a friend who's a nurse because she was drinking out of small plastic cups at work, and didn't have a good bottle that was easy to disinfect after work. She chose the color and the size, and she freaking LOVES it!
Date published: 2020-05-14
Rated 5 out of 5 by from Amazing features I bought this a couple monthes ago, and couldn’t be happier. I use it for everywhere and everything!
Date published: 2020-05-14
Rated 5 out of 5 by from My hydro flask I had a 32oz frost hydro flask and then it kept getting dented so I was like I think I should just buy a new one. But I do think hydro flasks a pretty expensive.
Date published: 2020-05-03
Rated 5 out of 5 by from 21 oz black Hydro regular cap I love hydroflask company products! I will not trust any other brand. Worth the price. My wqter stays cold for HOURS! They are durable and strong non fading products. Worth your money. No regrets. (Butterfly not included) lol.
Date published: 2020-04-30
Rated 5 out of 5 by from She loves it This was a gift for a 10-yr old and of course she loves it. It’s the perfect size for her, not too heavy. And she loves the color.
Date published: 2020-04-26
Rated 5 out of 5 by from Amazing Water Bottle I bought this a mouth ago and I'm in love with it. It keeps my water cold for hours especially when I put ice cubes also due to the mouth of the bottle its easy to put ice cubes in. Also the color is very pretty I thought it was going to be a gray color its more of a super light version lilac.
Date published: 2020-04-21
Rated 5 out of 5 by from Super convenient! Got this two weeks ago after having a coffee hydro. Got it for the color and the handle and I really love it!
Date published: 2020-04-17
Rated 5 out of 5 by from Great water bottle. Really love this water bottle. You will not be disappointed. Bought for my daughter in college. She loves it.
Date published: 2020-04-17
Rated 5 out of 5 by from WOW! I was given this as a Christmas present and I love it soooo much! I was given "frost" in the 21Ounce and it is the perfect size for my needs. I love how this actually works and keeps water/ice Ssooooo cool! I actually had to tip out the tea that I once put in one because it just wasnt cooling down enough to drink! The only thing I dont like is that they dent and the paint chips super easily, so you have to be super careful!
Date published: 2020-04-15
Rated 5 out of 5 by from Great bottle I bought this for my son who plays sports. None of his other bottles keeps his water cold for long, but his hydro flask.
Date published: 2020-04-15
Rated 5 out of 5 by from Love the color I bought this a month ago for my daughter to take everywhere that wouldn’t spill in her backpack or my car. Love the color fog. It’s perfect size for a 7 year old.
Date published: 2020-04-13
Rated 5 out of 5 by from Quality makes the difference Very nice bottle. It looks and feels like a quality piece.
Date published: 2020-04-12
Rated 5 out of 5 by from Very Durable! I bought this for my daughter and she loves it !!!!!
Date published: 2020-04-11
Rated 5 out of 5 by from Love my coffee flax Bought , love it. Keeps liquid hot for hours, enjoy that i can drink my coffee leave it and come back still hot. Would reccomend it .
Date published: 2020-04-09
Rated 5 out of 5 by from Love! Bought this a while back, love it, would purchase again! The color is even better in person and the quality is great!
Date published: 2020-04-08
Rated 5 out of 5 by from Perfect fit!!!! I just love my new hydro flask!! It‘a matte black and it’s a perfect size for when I’m running a quick errand or doing a quick 15 min workout.
Date published: 2020-04-06
Rated 5 out of 5 by from Never drinking water any other way again! I bought this a few weeks ago and it was the best decision I ever made in terms of drinking water. I love how cold my water stays- even after HOURS of being left in direct sunlight it’s still cold!! Not only that but I find myself drinking more water now because it’s more enjoyable so cold out of the hydro flask! I would recommend this to anyone.
Date published: 2020-04-03
Rated 5 out of 5 by from Pretty good I bought this bottle almost a year ago and it’s worked well! I can put ice in it before I leave in the morning and there is still some left when I come home 6 hours later! It also works well with hot chocolate and keeps it nice and warm! The only downside I’ve found is it’s very easy to mark it up. (Small streaks of paint from my walls, scratches, one small dent) Overall, it’s a very good water bottle that can hold its temperature!
Date published: 2020-03-31
Rated 5 out of 5 by from So well made Keeps water super cold, my entire family has one and I bought my friend one too bc she loved mine so much. Lasts such a long time.
Date published: 2020-03-29
Rated 5 out of 5 by from Love! The color is absolutely stunning! I love the sleek look, it’s perfect for on the go and at the gym! 10/10
Date published: 2020-03-27
Rated 5 out of 5 by from Color is sooooo cute!! Ordered the Hibiscus colored bottle for my daughter and she loves it. It is so pretty!!! Love love love it!!
Date published: 2020-03-24
Rated 5 out of 5 by from Great color Love the color and got a lot of compliments on it!
Date published: 2020-03-22
Rated 5 out of 5 by from Great product and color I bought this for my niece and she loves it. Pink is her favorite color.
Date published: 2020-03-19
Rated 5 out of 5 by from amazing colors I'm very happy with my purchase i run track and field and xc and we take our water bottles outside and it keeps my water cold even though the sun is blaring out and its adorable everyone complemented the color
Date published: 2020-03-19
Rated 5 out of 5 by from I RECOMEND THIS i got mine a while back and fell in love with it. i have dropped mine several times and it has no dint!!!!!!!! I will definently consider this product!!!!!
Date published: 2020-03-11
Rated 5 out of 5 by from It’s perfect! This year all my grandchildren (8!) and getting HydroFlask for birthday presents! Each gift has been a big success!
Date published: 2020-03-08
Rated 5 out of 5 by from Love the size and color I use this all the time and it’s the perfect size and not clunky. I got the sports cap with it and it’s been doing a good job keeping stuff cold but I’m not surprised
Date published: 2020-03-06
  • y_2020, m_7, d_6, h_15
  • bvseo_bulk, prod_bvrr, vn_bulk_3.0.10
  • cp_2, bvpage2n
  • co_hasreviews, tv_0, tr_752
  • loc_en_US, sid_S21SX, 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, 3.73ms
  • REVIEWS, PRODUCT
Questions
  • bvseo_sdk, p_sdk, 3.2.1
  • CLOUD, getContent, 3.19ms
  • QUESTIONS, PRODUCT
  • bvseo-msg: HTTP status code of 404 was returned;

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. Regular Price $7.95
    $5.96
    Small Flex Boot
    Colors Available
  2. Regular Price $34.95
    $17.48
    Small Tag Along Bottle Sling
    Colors Available
  3. $9.95
    Standard Mouth Insulated Sport Cap
    Colors Available