Bottles

21 oz Standard Mouth

$32.95
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Gallery Image 4238
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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.

Overview

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.

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

    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

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.

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

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 is rated 4.7 out of 5 by 533.
    Rated 5 out of 5 by from Keeps water cold I bought one and it keeps my water cold all day during school!
    Date published: 2019-09-14
    Rated 5 out of 5 by from Amazing 18 oz I bought this about a week ago and I’m absolutely in love. I haven’t dented it yet and I’m very clumsy it’s very durable and I love the amount of time that it keeps my drink cold.
    Date published: 2019-09-14
    Rated 5 out of 5 by from Great color choice and super durable! There is a great color choice variety and they are super durable! I would definitely recommend these products!
    Date published: 2019-09-14
    Rated 5 out of 5 by from awesome colors i love mine, it keeps my water cold longer than any other water bottles
    Date published: 2019-09-14
    Rated 5 out of 5 by from Love it! It is so cute and keeps my water so cold! Very happy with my purchase!
    Date published: 2019-09-14
    Rated 5 out of 5 by from Amazing I got this bottle over a month ago and I am so happy I did. It keeps my water cold all day and is such a cute color!!
    Date published: 2019-09-14
    Rated 5 out of 5 by from Amazing This is so good it keeps everything cold for hours and there cute and adorable
    Date published: 2019-09-14
    Rated 5 out of 5 by from INVEST YOUR MONEY IN THIS!!! no joke, this thing is amazing! this kept my water cold during my ACT and it was a life saver! It has yet to get scratched or dented and its honestly a great product. it is for sure worth your money.
    Date published: 2019-09-14
    Rated 5 out of 5 by from Best bottle ever I bought this bottle 6 months ago in a different color and I love it but it’s not keeping my drink cold anymore
    Date published: 2019-09-14
    Rated 5 out of 5 by from yep I loved my hydroflask i recommend for vsco girls like myself
    Date published: 2019-09-14
    Rated 5 out of 5 by from It keeps my drinks cold always!! My sister bought this for two weeks ago so I needed to get another!!
    Date published: 2019-09-14
    Rated 5 out of 5 by from Keeps drink super cold! I like how I can put ice in it in the morning and there will still be ice that night
    Date published: 2019-09-14
    Rated 5 out of 5 by from GREAT WATER BOTTLE Great quality! Definitely worth the $32.95! Great color choices and matches my pura vida stickers perfectly! It is also the perfect height to fit my metal straw! sksksksksksk
    Date published: 2019-09-13
    Rated 5 out of 5 by from keeps cold! i bought this a few months ago and i’m the happiest customer! i use it for everything. it’s amazing !!
    Date published: 2019-09-13
    Rated 5 out of 5 by from good quality stays cold all day and night i bought these 2 months ago and i’m happy i did because they are great and stay in great quality
    Date published: 2019-09-13
    Rated 5 out of 5 by from Great water bottle I’ve had mine for a year and it is the best water bottle ever and keeps water really cold
    Date published: 2019-09-13
    Rated 5 out of 5 by from Amazing ! I bought this water bottle and it can keep my ice going for 2 night straight !
    Date published: 2019-09-13
    Rated 5 out of 5 by from Awesome colour! I love the watermelon colour! Would recommend. Holds stickers well aswell
    Date published: 2019-09-13
    Rated 5 out of 5 by from Great bottle I bought this about 2 moths ago and it’s still is in great shape never been happier
    Date published: 2019-09-13
    Rated 5 out of 5 by from Amazing Colors Bought one a while ago, really like the weight and how well it holds cold
    Date published: 2019-09-13
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  • 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

    Does the height mentioned above count the cap as well or is it just the height of the flask without the cap?

    Asked by: jjff277
    The bottle stands at about 8.5" tall without it's cap. With the cap, it stands at about 9.4" tall.
    Answered by: Consumer Service
    Date published: 2019-06-07

    I have mold in the bottom of my bottle. How do I get rid of it? How often do you recommend washing?

    Asked by: Sallybear
    A good cleaning tip is to take about a teaspoon of baking soda and some water to make a thick paste. Use a bristled bottle brush to scrub the entire flask thoroughly. Then fill the flask up with boiling water. Leave the cap off the flask. Allow the flask to soak in the baking soda/water mixture until the water inside the flask is cool to the touch. Finally wash and rinse the flask with dish soap and allow it to fully dry.
    Answered by: Consumer Service
    Date published: 2019-06-06

    What is the material on the inside made of? And is there any toxic metals or other toxic chemicals used to manufacture these?

    Asked by: Marigold4
    18/8 and 18/10: These are the two most common grades of stainless steel used for food preparation and dining, also known as Type 304 (304 Grade) and are part of the 300 series. The first number,18, refers to the amount of chromium present and the second represents the amount of nickel. For example, 18/8 stainless steel is comprised of 18% chromium and 8% nickel. 304 grade stainless steel is also comprised of no more than 0.8% carbon and at least 50% iron. The chromium binds oxygen to the surface of the product to protect the iron from oxidation (rust). Nickel also enhances the corrosion resistance of stainless steel. Therefore, the higher the nickel content, the more resistant the stainless steel is to corrosion.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-07-01

    Can you keep a hydro in the refrigerator with water in it?

    Asked by: Teddy2
    You can put it in the refrigerator. It really does not help. The double vacuum is what keeps the beverages hot and/or cold.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-07-25

    Have standard sport cap for my 21oz flask. Purchased Jan 2017. Noticed recently a bubbling sound as I drink. Should there be this sound? Maybe it's always been there & I've just become aware of it. Or should it be quiet? In which case I'll buy new cap.

    Asked by: MarieD
    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: Hydro Flask Customer Team
    Date published: 2019-06-15

    Can it be placed in the freezer?

    Asked by: Jazzie
    We do not recommend putting the flask in the freezer.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-09-14

    Does this drink bottle dent easily when you drop it and would you recommend the boot otherwise?

    Asked by: sugarlotus866
    The flask can become dented if it is dropped. The boot does offer a little more protection, but depending on how it hits, it could still dent.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-08-24
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