Bottles

21 oz Standard Mouth

$32.95
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Gallery Image 4238
Gallery Image 1987
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

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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 603.
    Rated 5 out of 5 by from It’s amazing I love how it keeps my drinks cold. It works wonders.
    Date published: 2019-09-19
    Rated 5 out of 5 by from Awesome I loved my bottle I use it all the time. You won’t regret buying It
    Date published: 2019-09-19
    Rated 5 out of 5 by from Best thing ever! I bought my hydro flask about a week ago and I have used it everyday since. The product works very well with keeping your drinks cold, and it is very easy to clean. Also, you can save money by not having to buy plastic water bottles!
    Date published: 2019-09-19
    Rated 5 out of 5 by from Hydro I love this so much I use it every day. Everyone has them at school.
    Date published: 2019-09-19
    Rated 5 out of 5 by from Love this hydro flask It looks really nice and keeps my drink cool I absolutely love it
    Date published: 2019-09-19
    Rated 5 out of 5 by from amzing i bought one awhile ago and its amazing. Doesnt leak or nothing.
    Date published: 2019-09-19
    Rated 5 out of 5 by from Awesome design Ive never had one but my friends do and it keeps things super cold or just the way u like it
    Date published: 2019-09-19
    Rated 5 out of 5 by from great features it was really good water stayed cold for a long time
    Date published: 2019-09-19
    Rated 5 out of 5 by from Amazing It is the best water bottle ever. I would definitely buy more. The price is worth it.
    Date published: 2019-09-19
    Rated 5 out of 5 by from great quality this water bottle worked great for keeping my keeping my water cold, no spills, and great quality!
    Date published: 2019-09-18
    Rated 5 out of 5 by from Awesome colors! I have lots of friends with theses water bottles and they all Facebook great reviews.
    Date published: 2019-09-18
    Rated 5 out of 5 by from The best!! I bought this a few months ago and I love it! I love using it during volleyball games and track meets
    Date published: 2019-09-18
    Rated 5 out of 5 by from Great product I bought this a month ago and I’m so happy with how cold it keeps my drink all day long.
    Date published: 2019-09-18
    Rated 5 out of 5 by from Amazing! I bought one a long time ago and it keeps my drinks cold for such a long time! I’m so obsessed with it!
    Date published: 2019-09-17
    Rated 5 out of 5 by from Awesome Thermos to have! My drink stays cold all day! Very easy to open and shut. I love my hydro flask!
    Date published: 2019-09-17
    Rated 5 out of 5 by from Amazing Bottle I bought this a couple months ago and it is amazing! The bottle really keeps my drinks cold and I am in love with it!
    Date published: 2019-09-17
    Rated 5 out of 5 by from Great! This product is absolutely amazing the hydro flask is great!
    Date published: 2019-09-17
    Rated 5 out of 5 by from Wonderful I got this as a gift for my birthday and it is so amazing, although it’s easy to get dents I love it
    Date published: 2019-09-17
    Rated 5 out of 5 by from Love it! I wasnt really planning on getting one, but I did and I love it! It's so nice!
    Date published: 2019-09-17
    Rated 5 out of 5 by from Exquisite The hydroflask I bought is so cute. I mean definitely going to buy more
    Date published: 2019-09-17
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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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