Bottles

21 oz Standard Mouth w/ Sport Cap

$35.95
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Bottles

21 oz Standard Mouth w/ Sport Cap


Lifetime

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


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 385.
    Rated 5 out of 5 by from Family loves their HydroFlasks Great gifts for teenage kids on the go. Keeps beverages very cold even while the hydroflask is sitting in a hot car.
    Date published: 2020-05-24
    Rated 5 out of 5 by from Best bottle Great for work. 12 hour shifts ice will last the whole day. Amazing bottle
    Date published: 2020-05-22
    Rated 5 out of 5 by from Amazing!!! I am so happy that I got this! The color is so cute.
    Date published: 2020-05-22
    Rated 5 out of 5 by from My FAVORITE Hydroflask! :) Ever since I was turned on to Hydroflasks (3ish yrs ago) - I have replaced ALL my drinking vessels with hydroflasks. Love them! But this new watermelon, 21oz, with boot and sport cap is my all time favorite!
    Date published: 2020-05-22
    Rated 5 out of 5 by from The only water bottle you need! Bought as a gift and was well received. They loved the color and how it keeps beverages cold. I like the sport top, easy to drink at soccer practice!
    Date published: 2020-05-21
    Rated 5 out of 5 by from Perfect This has been exactly what I was looking for: hiking and working in the yard. Keeps things really cold for 24 + hours.
    Date published: 2020-05-20
    Rated 5 out of 5 by from Great Item I bought this to insure cold water all day without having to refill with ice during the day and that is what it does. Good description and works great on walks and everything. Definitely would recommended!!!
    Date published: 2020-05-10
    Rated 5 out of 5 by from LOVE! I bought this a year ago in frost. It kind of worries me that frost is gone in so many water bottles, but Iim grateful for my amazing one. I use it all day, and it stays cool. Excellent quality!
    Date published: 2020-05-09
    Rated 5 out of 5 by from Perfect size I bought 2 and totally worth it.. keeps my water cold all day and it fits perfectly in my cup holder which is what I needed .. it’s sturdy and easy to clean
    Date published: 2020-05-07
    Rated 5 out of 5 by from Best purchase ever I bought this bottle after my other bottle was dropped on a cement floor and ruined. My hydro flask has certainly met and exceeded my expectations!
    Date published: 2020-05-05
    Rated 5 out of 5 by from A+++ for quality and customer service! I ordered this for a friends birthday and (SUPER understandable with everything that is going on right now) I received the wrong color/cap. Normally it would NOT have been a big deal and I felt like a jerk even saying something but I knew she was looking and wanted the sport cap specifically plus the color is her fave so I wrote them. They replied the next business day and before I knew it I had the replacement one with no issues at all. I was prepared to just purchase the new one and suck it up but I honestly can’t say enough good things about their customer service team. I’ve always heard such great things about their products and company...now, from experience, I know why! I might just be ordering one for myself now! Thank you!
    Date published: 2020-04-30
    Rated 5 out of 5 by from Ice cold drinks! I’ve bought 7 in the last two months, and I can’t wait to get two of the wine tumblers!
    Date published: 2020-04-25
    Rated 5 out of 5 by from Hydro Flask is thebest I love my hydro flask! I am nine years old. But my dad won’t let me take it to school so i am finding another one for school
    Date published: 2020-04-24
    Rated 5 out of 5 by from Love the color We bought this for our daughter for her Easter basket. She had a larger one before this one and wanted something that fit in her school backpack a little better. This is perfect. And the watermelon color is great.
    Date published: 2020-04-22
    Rated 5 out of 5 by from Gift for my daughter I bought this for my daughter, she has one but she really likes this color. She told me that she wanted another one because she uses them at school for cold drinks that last all day.
    Date published: 2020-04-18
    Rated 5 out of 5 by from Great! Love hydro flask! This is my 4th one! Would definitely recommend the sport mouth. Does not leak at all.
    Date published: 2020-04-17
    Rated 5 out of 5 by from Loving my new Hydroflask I bought my Hydroflask like a month and a half ago and it's an amazing water bottle, shipping was fast and I love the color that I got, it works perfectly with hot and cold things.
    Date published: 2020-04-17
    Rated 5 out of 5 by from amazing i got this for my birthday and i love it so much .
    Date published: 2020-03-31
    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
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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: 2019-07-14
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