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 4.5 out of 5 by 359.
    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
    Rated 5 out of 5 by from Great source!!! I got this when it came out and it still is the best.
    Date published: 2019-12-21
    Rated 5 out of 5 by from Love it I bought this 3 weeks ago & i use it everyday! Definitely keeps your water cold ALL day, even the next day . I was skeptical to buy it & i know it’s a very trendy bottle. So I didn’t realize wanna buy it but im glad i did! Oh ! & they have cute colors.
    Date published: 2019-12-21
    Rated 5 out of 5 by from Tottaly worth it!! happy that i bought this holds cold and hot drinks been using this for about 3 months and im coming to the fact that this is the best water bottle ever!!!
    Date published: 2019-12-11
    Rated 5 out of 5 by from Great in Snow We purchased a Hydro before hiking a 14er in Colorado. We wanted to have some warm coffee on the way. I couldnt believe that after hiking 6 hrs, in below freezing conditions, our coffee was still hot!
    Date published: 2019-12-10
    Rated 5 out of 5 by from sport cap it works great for my soccer games ,but it makes me need to use the bathroom becuae i drink too much
    Date published: 2019-12-04
    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
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  • I would like to know if you guys still sell the mint colored 21oz standard mouth bottle. Also, do you guys bring back old colors? It was my favorite but I lost it and I can't see myself without that lovely color!

    Asked by: Jess15
    At this time we are not making the Mint color. Product colors are based on consumer feedback. I will forward your suggestion over to our product development team.
    Answered by: Consumer Service
    Date published: 2020-02-03

    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
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