Bottles

21 oz Standard Mouth

$32.95
Gallery Image 4238
Gallery Image 1987
Gallery Image 4650
Gallery Image 4238
Gallery Image 1987
Gallery Image 4650

Bottles

21 oz Standard Mouth

$32.95

Lifetime

  • Flex Cap
    Flex Cap
    Included
  • Sport Cap - +$6.00
    Sport Cap
     
$32.95

Quantity

Customize Purchase via Dealer

Sale discount on this color will be automatically applied in cart.

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

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

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.

Pro-Grade Stainless Steel

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
  • Lifetime Warranty

    Lifetime Warranty

    We stand behind our products.

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

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

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

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.

Pro-Grade Stainless Steel

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
  • Lifetime Warranty

    Lifetime Warranty

    We stand behind our products.

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

Details & Specs

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

Video

Reviews/Q&A

  • Reviews

  • Q & A

  • 21 oz Standard Mouth is rated 4.7 out of 5 by 671.
    Rated 5 out of 5 by from Love my hydro flask Bought this for my daughter and she absolutely loves it. Loves taking it to school and her dance lessons. It makes her so happy
    Date published: 2020-01-19
    Rated 5 out of 5 by from Amazing Quality I bought it a month ago and have used It extensively with multiple different liquids. Has held up great and it keeps my drinks hot and/or cold for a long time. It also feels and even SOUNDS amazingly satisfying.
    Date published: 2020-01-18
    Rated 5 out of 5 by from Great! Love it! I brought my daughter a hydro flask for Christmas. It’s the cool thing for middle schooler to have a hydro flask. I got hers in white and added a pink top and pink boot with some waterproof decals and she takes it with her every day
    Date published: 2020-01-17
    Rated 5 out of 5 by from Hydro Flask Growler We received a Hydro Flask Growler as a gift! Best gift! Keeps the beer not only COLD but just as if it came out of the tap!! Love it. Also have given Hydro Flask as gifts!
    Date published: 2020-01-17
    Rated 5 out of 5 by from Amazing! Bought this for my granddaughter, and she loves it! It goes with her everywhere.
    Date published: 2020-01-16
    Rated 5 out of 5 by from The only cup I use I use these everyday for any drink I have. Absolutely love them. Refuse to use anything else. It's the perfect size and dishwasher safe. Thank you Hydro Flask.
    Date published: 2020-01-16
    Rated 5 out of 5 by from 13 year old drinking a lot more water I bought this because my daughter mentioned around Christmas she wanted a nice water bottle and I was hesitant because of the price tag. I have never seen her drink more water and she is always carrying with her everywhere. Very happy with purchase & glad she is getting good use out of it!
    Date published: 2020-01-15
    Rated 5 out of 5 by from The best! I only drink water out of my hydro flask. It’s the perfect size, easy to carry, and keeps water v cold. It is my favorite thing.
    Date published: 2020-01-15
    Rated 5 out of 5 by from Thrilled! Purchased for my housekeeper's daughter who very much wanted this flask; and, daughter was thrilled with [email protected]
    Date published: 2020-01-13
    Rated 5 out of 5 by from Gifted to Kids for School, Popular Hit Kids Love them, kinda Pricey but better than having them use plastic bottles
    Date published: 2020-01-12
    Rated 5 out of 5 by from The best water bottle. This is my 3rd hydroflask, I have one for home and the office, 21oz and 40 oz. . I have been using these products for the last 3 years and it is wonderful. Live in Florida and work on boats and my hydroflask always keeps the water ice cold. The bottles have taken many beatings and hold up well. Easy to clean and well worth the investment.
    Date published: 2020-01-11
    Rated 5 out of 5 by from Great I really love how my drink stays cool for so many hours.!
    Date published: 2020-01-10
    Rated 5 out of 5 by from Does what it is supposed to! I purchased this as a Christmas present for my daughter. It has a durable finish and keeps her dri ks cold all day. Couldn't be happier.
    Date published: 2020-01-09
    Rated 5 out of 5 by from Great Flask I purchased 2 flask for 2 of my Granddaughters for Christmas, they Love them, fast shipping quality product, good communication. Thanks!!!
    Date published: 2020-01-08
    Rated 5 out of 5 by from Just more if the same greatness! From the packaging to the finish Hydroflask keeps making great quality products!
    Date published: 2020-01-05
    Rated 5 out of 5 by from Great bottle I have 1 bottle in this size and it is great if I am going out for a couple hours. Keeps my water very cold and isn’t too large to just carry around.
    Date published: 2020-01-03
    Rated 5 out of 5 by from Great Product and durable I bought this flash for my 10 year old daughter and she has never been so hydrated. Its durable and she loved decorating the outside with stickers, making it her own.
    Date published: 2020-01-03
    Rated 5 out of 5 by from Love it! I am so happy I decided to purchase this product. It is fashionable and easy to carry and most important it keep my drinks cold.
    Date published: 2019-12-29
    Rated 5 out of 5 by from Love the vibrant colors I have had this for a week it is great! It keeps your drink cold.
    Date published: 2019-12-26
    Rated 5 out of 5 by from wow such a reliable water i think this water bottle i amazing and i totally recommend it for you but here is a quick note the top is the most sensitive part
    Date published: 2019-12-26
    • y_2020, m_1, d_22, h_14
    • bvseo_bulk, prod_bvrr, vn_bulk_3.0.4
    • cp_1, bvpage1
    • co_hasreviews, tv_0, tr_671
    • 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, getContent, 19.75ms
    • REVIEWS, PRODUCT
  • Where is this bottle manufactured?

    Asked by: j1234
    Manufactured in China but shipping from Southaven, MS.
    Answered by: Consumer Service
    Date published: 2019-12-30

    Is there a cap available for purchase that would allow me to use my standard mouth Hydro Flask 21oz with hot drinks? I purchased 2 hoping to use one for hot and the other for cold. However I have not been able to use hot drinks due to the cap. Frustrated

    Asked by: Limey
    We currently have two caps for the standard mouth flasks. We have the sports cap and the flex cap.
    Answered by: Consumer Service
    Date published: 2019-11-03

    The jade color was available yesterday, but is not now. Will it be available again?

    Asked by: Lindsayb
    I apologize for the issue you are having. Please contact customer service at 888-584-9376 to discuss this further.
    Answered by: Consumer Service
    Date published: 2019-10-29

    Can big pieces of ice fit in the standard mouth cap

    Asked by: unknown123456
    The mouth diameter is 1.91 inches. Ice cubes smaller than this will fit.
    Answered by: Consumer Service
    Date published: 2019-10-29

    how do i add this to my wishlist?

    Asked by: maroonscrunchie8
    Unfortunately, our website does not have an option to add to a wish list.
    Answered by: Consumer Service
    Date published: 2019-10-29

    Can I use the bottle to keep milk cold? I know some metals are not recommended to be in contact with milk.

    Asked by: Jsyd
    Yes, milk should be fine! We would just suggest taking extra care with cleaning after putting anything besides water in the flask.
    Answered by: Consumer Service
    Date published: 2019-10-28

    If I order 10 bottles, can a logo be imprinted on them?

    Asked by: Sandy33
    No. We recommend that you take them to a local engraver of your choosing.
    Answered by: Consumer Service
    Date published: 2019-10-27

    Are any of the water bottles dishwasher safe? 

    Asked by: SEO1
    no they are hand wash only
    Answered by: karen452
    Date published: 2019-07-02
    • y_2020, m_1, d_23, h_17CST
    • bvseo_bulk, prod_bvqa, vn_bulk_3.0.4
    • cp_1, bvpage1
    • co_hasquestionsanswers, tq_88
    • loc_en_US, sid_S21SX, prod, sort_[SortEntry(order=LAST_APPROVED_ANSWER_SUBMISSION_TIME, direction=DESCENDING)]
    • clientName_hydro-flask
    • bvseo_sdk, p_sdk, 3.2.1
    • CLOUD, getContent, 18.76ms
    • QUESTIONS, PRODUCT

Product Tags

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

Size and Fit Chart

Close