Bottles

21 oz Standard Mouth w/ Sport Cap

$35.95
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Bottles

21 oz Standard Mouth w/ Sport Cap

$35.95

Lifetime

  • Sport Cap
    Sport Cap
    Included
  • Flex Cap - -$6.00
    Flex Cap
     
$35.95

Quantity

Purchase via Dealer

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

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

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, 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

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, 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

Video

Reviews/Q&A

  • Reviews

  • Q & A

  • 21 oz Standard Mouth w/ Sport Cap is rated 4.6 out of 5 by 340.
    Rated 5 out of 5 by from Great quality! This product is exactly what I hoped it would be. Cold water for hours! Love it
    Date published: 2019-11-22
    Rated 5 out of 5 by from Great water bottle I bought one and went to Disneyworld and it kept all of my water cold the whole day
    Date published: 2019-11-20
    Rated 5 out of 5 by from Awesome cap Bought for daughters soccer games and works great for a grab and go situation
    Date published: 2019-11-17
    Rated 5 out of 5 by from Works great! I bought this for my daughter so she could have a cold drink all day at school and at dance it works great! She can fill it with ice in the morning and still has ice that night! I’m thinking of ordering one for myself!
    Date published: 2019-11-12
    Rated 5 out of 5 by from Water is Ice Cold This is the only bottle I have ever owned that keep water ice cold for days. Before long trips, I fill it with ice. As I drink the water, I just add more and it is cold for days!!!
    Date published: 2019-11-06
    Rated 5 out of 5 by from Really cool I bought this a month ago and it works great! Keeps the water cold.
    Date published: 2019-11-02
    Rated 5 out of 5 by from My Awesome Hydro Flask It’s a nice and bright color! Keeps water cold forever. The sport top is great. Great product!!!
    Date published: 2019-10-31
    Rated 5 out of 5 by from My hydro flask I got my hydro flask in the mail and I loved it and the colorp
    Date published: 2019-10-26
    Rated 5 out of 5 by from Amazing Job I bought this a week ago and I thought it would be amazing!!!! It washes easily, and it so so fun to drink out of!!! Can’t wait to order another one!!! Hope others will be inspired by this review and get one too!!!!
    Date published: 2019-10-21
    Rated 5 out of 5 by from Lives up to the hype! Now I'm drinking more water. Next one will be larger with a straw lid. No regrets.
    Date published: 2019-10-20
    Rated 5 out of 5 by from Green Features I got my first one at REI and it is great I take it everywhere
    Date published: 2019-10-19
    Rated 5 out of 5 by from I oop Bought for teen pax player because he “wanted to stay hydrated” at school. Having owned a Hydro flask for several years now I knew how awesome they were and thought how responsible of this young athlete. Little did I know he was trying to get a scrunchie from a VSCO girl... sksksk
    Date published: 2019-10-19
    Rated 5 out of 5 by from Awesome color red My son purchased this and he absolutely loves it!!!
    Date published: 2019-10-12
    Rated 5 out of 5 by from the greatest water bottle to exist I bring this with me every where I go!!! It is perfect for any drink! Plus the color is so cute!
    Date published: 2019-10-11
    Rated 5 out of 5 by from Love it!! Perfect size for an everyday bottle. I like the sports kid a lot, though u forgot that it does leak. Great product!
    Date published: 2019-10-08
    Rated 5 out of 5 by from Love the water bottle and color! I was apprehensive about purchasing this water bottle based on price. However, I am very pleased with it! It keeps my water ice cold for hours on end, and I’m the color is vibrant and cool. I highly recommend the sport cap too. Never leaks and makes drinking easier.
    Date published: 2019-10-07
    Rated 5 out of 5 by from Best water bottle ever! This is the best water bottle I’ve ever had, however everybody in school makes fun of me for having it... saying I’m a “vsco girl”. I don’t even know what that means.. I’m a guy!
    Date published: 2019-10-03
    Rated 5 out of 5 by from I love it I bought it a month ago and I love it. I’ve started to drink much more water since getting my hydro flask.
    Date published: 2019-10-03
    Rated 5 out of 5 by from My daughter absolutely loves the flask This was a birthday gift for my daughter! We purchased the yellow color flask and the color is very sunshine and beautiful.
    Date published: 2019-09-29
    Rated 5 out of 5 by from The Best! I bought this for my teen age sons birthday. It keeps his water ice cold all day long even in ninety degree temperatures. There is even still ice in the bottle at the end of the day. Awesome!
    Date published: 2019-09-26
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  • Can I order this bottle but with the flex-cap? I noticed that they don't offer the 21oz Standard Mouth w/ flex cap in the "frost" color.

    Asked by: kyororo
    The 21oz standard flask that comes with the flex cap is currently out of stock in the color Frost. Please contact customer service at 888-584-9376 to discuss this further.
    Answered by: Consumer Service
    Date published: 2019-10-30

    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’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. 

    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? 

    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: 2019-06-07

    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: 2019-06-06
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