Bottles

21 oz Standard Mouth

£31.94
21 oz Standard Mouth

Bottles

21 oz Standard Mouth

£31.94


  • Flex Cap
    Flex Cap
     
  • Sport Cap - +£7.26
    Sport Cap
     

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
  • TempShieldTM 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"
Product Diameter 2.87"
Product Height 9.4"
Product 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.

  • BPA-Free

    BPA-Free

    Sip and enjoy.

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

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
  • TempShieldTM 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"
Product Diameter 2.87"
Product Height 9.4"
Product 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.

  • BPA-Free

    BPA-Free

    Sip and enjoy.

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

Video

Reviews/Q&A

  • Reviews

  • Q & A

  • 21 oz Standard Mouth is rated 4.7 out of 5 by 636.
    Rated 5 out of 5 by from Overall good I bought my hydroflask a week ago and already love bringing it places and it is an amzing waterbottle. Love it!
    Date published: 2019-09-20
    Rated 5 out of 5 by from amazing product I purchased my hydroflask 2 months ago and it is the most perfect thing ever I love it so much
    Date published: 2019-09-20
    Rated 5 out of 5 by from Amazing quality I bought this about a week ago and I’m in love!! It keeps my drink very cold and the ice is still there after hours. I recommend this waterbottle
    Date published: 2019-09-20
    Rated 5 out of 5 by from keeps water really cold I love it so much I literally take it everywhere but they dent very easy.
    Date published: 2019-09-20
    Rated 5 out of 5 by from Keeps water cool all day¡ Amazing quality, keeps ice all day, really impressed with its durability and quality
    Date published: 2019-09-20
    Rated 5 out of 5 by from Awesome Keeps you water either hot or cold super well!! I do recommend!!
    Date published: 2019-09-20
    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
    Rated 5 out of 5 by from Good insulation I bought a hydro flask about a month ago and I love it. It's really hot where I live and when I put ice in the bottle it doesn't melt. I love it!!
    Date published: 2019-09-17
    Rated 5 out of 5 by from I love this water bottle My water is always cold! The ice lasts from 7:30 in the morning through my soccer practice which ends at 5:30. This is literally the best water bottle! 10/10 totally recomend
    Date published: 2019-09-17
    Rated 5 out of 5 by from water always cold got this for my birthday and was super excited with it! getting a little worn out though and would love a new one!!
    Date published: 2019-09-17
    Rated 5 out of 5 by from Keeps ice cold Forbes long periods of time!! So happy that I purchased it!! It is really reliable to keep your drink Cold and doesn’t leek.
    Date published: 2019-09-16
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  • Do you ship to Australia? How much is the postage?

    Asked by: sugarlotus866
    We do not ship international.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-08-24

    can the waterbottle shown above be used for HOT and cold also if i do the lid and the add on one can that be used for hot drinks

    Asked by: dudek1313
    The flasks can be used for hot and/or cold beverages. This flask is a standard mouth flask. Our hot beverage cap would be the flip cap which is for wide mouth flasks. So, if you want that cap, it would have to be a wide mouth flask.
    Answered by: Hydro Flask Customer Team
    Date published: 2018-01-11

    Hi! Is this product dishwasher safe?

    Asked by: RaspyRach
    No. We do not recommend placing the flasks in the dish washer.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-03-20

    Does the 21 oz fit in a standard car cup holder? What are the dimensions?

    Asked by: gm23
    Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-01

    Does this size fit in most car cup holders? 

    Asked by: Christina B
    Yes, the 21 oz would usually fit. It usually is those 32 oz and up that do not fit in the standard car holders.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-01

    What is the width of the bottom?

    Asked by: Alley132
    Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-13

    How long will these keep drinks hot for? I typically only drink ice cold beverages, but going to an outdoor football game tonight!

    Asked by: MommaTiah
    We say up to 12 hours.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-11-29

    Why does the hydration bottle say they keep liquid hot for 12 hours where the coffee bottles say they keep it hot for 6?

    Asked by: Leddy
    This would be a difference of the cap. The hydration flasks have the flex cap which does not have any openings and has the honeycomb insulation. The flip cap that comes on the coffee flasks has a hole in the cap and does not have the honeycomb insulation.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-14

    Is this water bottle spill proof?

    Asked by: Raincloud
    The flex cap would be the leak proof cap.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-14

    I want to purchase a 21oz standard mouth but does the straw lid fit on it? 

    Asked by: Awesome
    We currently do not make a straw cap for standard mouth flasks.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-13

    Does the sport cap work on this?

    Asked by: aje05
    Yes, the sports cap would fit any standard mouth flask.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-10-05

    Can these products be used in the microwave/

    Asked by: kbabe
    No, we would not recommend putting the flask in the microwave. It is made out of stainless steel.
    Answered by: Hydro Flask Customer Team
    Date published: 2019-09-10

    Are any of the hydro flask water bottles dishwasher safe? If not how do I clean them?

    Asked by: Ciara
    We do not suggest putting your flask through the dish washer. For cleaning, we recommend hand washing with a bottle brush and mild dish soap.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-09

    Hi! so with "TempShieldTM insulation eliminates condensation" no sweating? My youngster doesn't have a side pouch to his backpack for a waterbottle and we can't have soggy homework ... :)

    Asked by: Suz ML
    The flask should not have any condensation on the outside of the flask.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-14

    maybe make this in blush pink?

    Asked by: custumer123
    Product colors are based on consumer feedback. I will forward your suggestion over to our product development team.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-18

    how tall is the 21 oz flask

    Asked by: jayceearmo
    Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-14

    Can you personalize these?

    Asked by: Aja Sui
    At this time we do not offer any engraving services for personal or corporate orders. We suggest reaching out to trophy or engraving shops for a quote!
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-18

    I have the 21 oz. hydroflask with the  2 inch opening (roughly). Where Can I buy a new caos. 

    Asked by: Bobby D
    You can purchase it from our website under accessories, or click on find a store at the top right of our website.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-07-26

    Are these bottles able to be put in the dishwasher?

    Asked by: Elysse
    No, we do not recommend the dishwasher for the flasks.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-14

    Hi, I have a couple hydrofkasks and both have the lead gaskets coming out every time I open it. I bought it only a couple months ago. I heard about your life warranty so I wondered how I could use it to fix this issue.  Thanks, 

    Asked by: Kristina_Kristina
    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: 2017-12-14

    Can you easily put ice cubes into the standard mouth bottles?  Or are they a bit limited?

    Asked by: Crys
    You can put ice in the standard mouth. I have never had any issues. The mouth diameter of the standard is 1.91 inches compared to the wide mouth at 2.28 inches.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-06-29

    Do you still over the standard mouth with loop cap?

    Asked by: candacejennings
    We do still have loop cap available for warranties. Just go to www.hydroflask.com/warranty.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-07-01

    How tall is the 21oz bottle? Diameter? Thanx

    Asked by: Stace99
    Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/
    Answered by: Hydro Flask Customer Team
    Date published: 2017-06-23

    hi. I'm interested in buying the 21 oz Standard Mouth in white color, but I wanted with a different cap. With the one with the hole inside like the one you advertise in the video above. Is it possible to get it, or do you no longer manufacture those? 

    Asked by: iris690
    You can do a warranty claim for the standard loop cap, but they are no longer for sale. It has been replaced with the standard mouth flex cap.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-18

    hi just want to ask if you still  have the free shipping promo of i buy two hydro flask 

    Asked by: hiroshi
    Yes. If you order two or more flasks you would get free shipping.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-18

    Are you guys out of the mint color 21 oz water bottle because I ordered one and it came in the new sage color?

    Asked by: payton512
    Call us at 888-584-9376.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-18

    I am the manager of a private high school campus store and wonder if you give any discount or sell wholesale? I know our students would love to have a hydro flask with our logo!!

    Asked by: dmccarthy
    You can call us at 888-584-9376 to speak further about this.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-12-10

    My hydro Flask doesn't keep the water temperature for very long. The water gets cold quite quickly. Isn't it supposed to be a thermal bottle?

    Asked by: Evvvaaa
    You can test the insulation of your flask by filling it with boiling water. After about 5 minutes, feel the outside of the flask (below the neck). If you feel any hot spots, the insulation has been compromised and you are eligible for a replacement.
    Answered by: Hydro Flask Customer Team
    Date published: 2018-01-22

    does this flask come with a flip top flask

    Asked by: Hoppy
    The flip cap is made for the wide mouth flasks. The standard sized flasks caps available are the standard sized flex cap and the sports cap.
    Answered by: Hydro Flask Customer Team
    Date published: 2017-06-05

    I bought one of the aluminum pint mugs and am looking to get it engraved. Is the aluminum one anodized?

    Asked by: mike T
    At this time we do not offer any engraving services for personal or corporate orders. We suggest reaching out to trophy or engraving shops for a quote!
    Answered by: Hydro Flask Customer Team
    Date published: 2017-06-05
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