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

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 643.
    Rated 5 out of 5 by from Amazing durability. I bought this a few weeks ago and can honestly say I love it so much. Water stays chilled all day long. The exterior durability is fantastic and has survived serval drops.
    Date published: 2019-10-09
    Rated 5 out of 5 by from My daughter loves her Hydro Flask Super popular and stylish. The new Jade color is very pretty and my daughter uses it every day for school and sports.
    Date published: 2019-10-07
    Rated 5 out of 5 by from Great for School Just have to my son for his birthday and he already loves having it as his water bottle at school. Very durable and fits great in backpack.
    Date published: 2019-10-04
    Rated 5 out of 5 by from Keeps drinks cold and carbonated Love this flask. Doesn’t leak and keeps the liquid as it’s supposed to be. Highly recommended.
    Date published: 2019-09-29
    Rated 5 out of 5 by from Love it! I’m always on the move and I never drank enough water because I have to drink it ICE COLD! My hydro flask fits right in my back pack and I take it everywhere with me. I’m getting my grandmother won for Christmas
    Date published: 2019-09-22
    Rated 5 out of 5 by from Amazing bottle I loved this bottle, I got it for Christmas and I loved it. Really heavy duty and is long-lasting. I really recommend.
    Date published: 2019-09-22
    Rated 5 out of 5 by from Great features I bought this a month and I’m in love with the color I got. I keeps my water cold all day
    Date published: 2019-09-21
    Rated 5 out of 5 by from AMAZING! I bought this and im glad i did. It has amazing colors and holds alot! i would suggest this to people who want waterbottles that hold lots!
    Date published: 2019-09-20
    Rated 5 out of 5 by from Great Features I bought this a month ago and I am so glad I did!! I recommend and I oop sksks
    Date published: 2019-09-20
    Rated 5 out of 5 by from nice bottle! very durable, nice, would 100% recommend, good price !!!
    Date published: 2019-09-20
    Rated 5 out of 5 by from Great price This Hydro Flask I a great Price compared to the other I have seen.
    Date published: 2019-09-20
    Rated 5 out of 5 by from Best water bottle! I bought my hydro about a month ago and I absolutely love it!! It keeps my water cool for the whole day!
    Date published: 2019-09-20
    Rated 5 out of 5 by from AMAZING I was gifted an 18 oz wide mouth and I loved it now I’m looking forward to getting a 21 oz standard mouth
    Date published: 2019-09-20
    Rated 5 out of 5 by from Easy to carry around I bought this about two months ago and I’m so happy I did it has helped me out so much especially when I go out for a run.
    Date published: 2019-09-20
    Rated 5 out of 5 by from Great features I bought it awhile ago and it’s amazing it keeps everything cold on the hottest days would recommend!
    Date published: 2019-09-20
    Rated 5 out of 5 by from stays cool really long and worth the price it’s the best water bottle i ever bought . it stays cold for so long. I’m a professional lacrosse player and it’s great!
    Date published: 2019-09-20
    Rated 5 out of 5 by from Keeps water ice cold I use my hydro flask everyday and it keeps my water ice cold all day
    Date published: 2019-09-20
    Rated 5 out of 5 by from Best for Arizona heat I bought this standard mouth hydro flask and it was amazing. I am a teacher and we stay outside in the Arizona heat for duty. The ice stays cold and keeps me cool in the 115 degree heat!
    Date published: 2019-09-20
    Rated 5 out of 5 by from Yeahhh I really like this bottle, it's amazing!! It keeps water so cold!
    Date published: 2019-09-20
    Rated 5 out of 5 by from great features i bought this a week ago and i’m so glad i did!! it keeps my water cold even throughout 24 hours!!
    Date published: 2019-09-20
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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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