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.

Overview

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.

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

    Tempshield

    Colder. Hotter. Longer.

    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.

  • Proprietary Powder Coat

    Proprietary Powder Coat

    Comfortable and durable.

    Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.

  • BPA-Free

    BPA-Free

    Sip and enjoy.

    Our products are BPA-free for ultimate purity. Stay refreshed and worry-free.

  • Lifetime Warranty

    Lifetime Warranty

    We stand behind our products.

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

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Overview & Specs

Overview

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.

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

Technology

  • TempShield

    Tempshield

    Colder. Hotter. Longer.

    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.

  • Proprietary Powder Coat

    Proprietary Powder Coat

    Comfortable and durable.

    Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.

  • BPA-Free

    BPA-Free

    Sip and enjoy.

    Our products are BPA-free for ultimate purity. Stay refreshed and worry-free.

  • Lifetime Warranty

    Lifetime Warranty

    We stand behind our products.

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

Video

Reviews/Q&A

  • Reviews

  • Q & A

  • 21 oz Standard Mouth w/ Sport Cap is rated 4.1 out of 5 by 95.
    Rated 5 out of 5 by from love it!!! thought this was a little expensive for a water bottle but tbh its pretty worth the 40$
    Date published: 2019-08-17
    Rated 5 out of 5 by from So great! I bought this a couple months ago and this is so great! I am a dancer and a hiker so this is perfect for both!!!
    Date published: 2019-08-05
    Rated 5 out of 5 by from Love it I love it keeps my water really cold the best decision I’ve made I even order another one which I haven’t received but hopefully i will receive it pretty soon
    Date published: 2019-07-31
    Rated 5 out of 5 by from Great feature! Makes me love to drink water especially this hot season
    Date published: 2019-07-31
    Rated 5 out of 5 by from Hydroflask I bought it a week ago and it's really great I could hold it. Really tight I love this and I recommend a hydroflask for everyone it's great
    Date published: 2019-07-31
    Rated 5 out of 5 by from Love the sport cap! I bought this as a 10th birthday gift for my granddaughter. She loves it!
    Date published: 2019-07-28
    Rated 5 out of 5 by from Awesome! Very happy with purchase, carrying it with me all day long.
    Date published: 2019-07-27
    Rated 5 out of 5 by from Perfect Size Great water bottle for school, fits well in the back pack and keeps water cold all day!
    Date published: 2019-07-26
    Rated 5 out of 5 by from Love it! I love my Hydro Flask! It keeps my water cold and is easy to drink out of with the sport cap! Some other reviews said it leaked but I haven't had any problems
    Date published: 2019-07-22
    Rated 5 out of 5 by from I’m in love with it I’ve had my eye on a hydro flask for so long and I’m glad I finally got one! It is so beautiful and keeps my water cold for days!
    Date published: 2019-07-19
    Rated 5 out of 5 by from Worth it I really love my hydro flask fr, I do recommend however the straw cap rather than the sport cap, I just find it more convenient personally. The color is beautiful and it keeps drinks so cold or hot forever!!
    Date published: 2019-07-19
    Rated 5 out of 5 by from So fun I am happy with my HYDROFLASK :) very gooD bottle for Every OCassion
    Date published: 2019-07-19
    Rated 5 out of 5 by from Nice color I’ve been wanting a hydro flask for some time now and I finally got it and it’s the best. The only problem was the bottle cap which doesn’t fully close and spills easily. It’s also a little hard to open the cap.
    Date published: 2019-07-15
    Rated 5 out of 5 by from in love with this. i bought my hydro flask probably about a month ago because a friend had one and i thought it was nice. it’s a little pricey but definitely worth it! (it also arrived quickly)
    Date published: 2019-07-14
    Rated 5 out of 5 by from amazing bottle i bought this about 2 weeks ago and it is one of the sturdiest things I've ever owned I'm so glad i bought it, it was totally worth it
    Date published: 2019-07-09
    Rated 5 out of 5 by from Works great I can put it in my truck at 9 in the morning and the water is still cold by 4 in the afternoon
    Date published: 2019-07-08
    Rated 5 out of 5 by from Great insulation My husband & I have used them for 3-4 yrs. & don't leave home without them! Because my grandchildren always want to drink out of mine, I am purchasing one for each of them for their birthdays!
    Date published: 2019-07-04
    Rated 5 out of 5 by from Love it Use everyday keeps water cold all day! Still ice after 6 hours
    Date published: 2019-06-23
    Rated 5 out of 5 by from Perfect for taking to workouts I take it to the gym everyday. Keeps my water cold. There isn’t any after taste in the water like I have had with other products. My only wish is I would have bought the 24 oz instead!
    Date published: 2019-06-19
    Rated 5 out of 5 by from amazing i really love the water bottle, keeps my drinks cold for a long period of time. however it seems as if the sports cover scratched up the lip of my bottle. the entire outside lip is all cut up, which is surprising.
    Date published: 2019-06-17
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  • 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

    I see several complaints about the sports cap leaking. I want a cap that you don't have to unscrew to drink from and need the standard size to fit into my cupholder. Anyone have good experience with the sports cap or recommendations for a different one?

    Asked by: Lucy Lee
    The Standard Mouth Sports cap is NOT advertised as leak proof, and there is potential for dripping if overturned or shaken. If transporting your flask in a situation where it may not remain upright or could be jostled, we recommend using a sealed lid such as the Flex Cap.
    Answered by: Consumer Service
    Date published: 2019-06-06

    Do I need to purchase a straw for this water bottle or is the included sport cap all I need?

    Asked by: ward
    The sports cap is made to be tilted up to drink from.The product does not come with a straw included.
    Answered by: Consumer Service
    Date published: 2019-06-01

    Does it have a straw in it?

    Asked by: Soccergirl11
    The Sports Cap just has the spout. It does not have a straw in the lid.
    Answered by: Consumer Service
    Date published: 2019-05-31

    Which bottle best fits into a bicycle water bottle cage holder? Could you please include photos of bicycles with a hydroflask in the bottle cage? It would be so much more helpful than your standard response to this question on the FAQ page.

    Asked by: SLuke
    I use the 21 oz bottle with the flex cap in my bike holder and I believe the 24 oz would also fit since it’s just taller.
    Answered by: Kim99
    Date published: 2019-05-07

    I’m planning to order a hydro and would love to put stickers on it. What is the area of this hydro so I’ll know how many stickers to order? Thanks!

    Asked by: quinlan21
    Quinlan21, Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
    Answered by: customer servcie
    Date published: 2019-05-07

    Will a straw lid be available for the 21oz HF?

    Asked by: Haughtohio72
    We do not currently manufacture a product that matches your request, but we’ll document your suggestion for future consideration by our Product Development Team.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-01-11
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