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 4.8 out of 5 by 330.
    Rated 5 out of 5 by from Lasts years I took a trip to Hawaii in August of 2015 and I needed a water bottle for all the hiking I was going to be doing. The family friends I was staying with recommended hydro flask so I bought one that week. It’s currently March of 2019 and I’m still using the same water bottle after using it pretty much every single day, and it still works just about as well as it did when I bought it. Its been nearly four years and in that time its rolled down a mountain, fallen out of a moving vehicle, and has been dropped a few times so it’s dented, and chipped all over the place so I’m amazed that it still works so well. My only complaints are that it does chip and ding very easily. It seems like anytime it falls more than a foot there’s another notch in the color. Also, the color seems to be wearing off in places. I bought a flex boot for it yesterday to try to protect it enough to get more use out of it.
    Date published: 2019-03-12
    Rated 5 out of 5 by from My favorite water bottle! This is the third water bottle I've purchased in this size and style and I love it! The cap seals perfectly so you don't have to worry about spills, and it doesn't create any condensation on the outside even with ice cold water.
    Date published: 2019-03-11
    Rated 5 out of 5 by from Nice size! I like this smaller one to grab and go for the car! Fits right in my cup holder!
    Date published: 2019-03-09
    Rated 5 out of 5 by from It’s amazing Ever since l Got it lve been motivated to drink more water. Love it
    Date published: 2019-03-09
    Rated 5 out of 5 by from LOVE. The color is gorgeous. The bottle is so sturdy. I love the twist off cap with handle. Fits in my cup holder easily. Best water bottle ever. Beautifully packaged and delivered as well!
    Date published: 2019-03-05
    Rated 5 out of 5 by from I don't know why I waited so long to purchase one I bought this a month ago and have been so pleased. My water stays ice cold all day and even overnight. Very pleased.
    Date published: 2019-03-04
    Rated 5 out of 5 by from Love love love I bought the standard mouth 21oz hydro flask in Frost. Holy moly, I am so in love with this color. I have the 32oz in mint but I love the light simplicity look of this color.
    Date published: 2019-02-28
    Rated 5 out of 5 by from Amazing container... I recently purchased this for my daughter, she loves the color it’s so bright. It keeps the water cold for hours and even when there is no more water the ice cubes stay frozen till the morning.
    Date published: 2019-02-20
    Rated 5 out of 5 by from Quality Water Flask As an athlete, I work to keep hydration as a central part of my life. Naturally, I believe water is the most key source of hydration. I take water with me to all of my sporting events. I also bring water to school five days out of the week. As you can imagine, that would be a ton of plastic bottles. This is why I take my Hydro Flask with me to everywhere I go. This bottle has a handle connected to the cap, making it easy to hold. This may sound like an irrelevant feature, but you would be surprised how many times I have dropped my past refillable aluminum bottles. This bottle is the perfect dimensions for all convenience, fitting nicely into the side pocket of my backpack. This bottle is also insulated, making it ideal for many different drinks. The bottle is wide mouthed, making for a smooth drinking experience. The only con I have about this bottle is that when I straighten the bottle back from taking a sip, it has a tendency to splash out of the mouth. This is a problem that has persisted throughout my use of all aluminum bottles. Lastly, the Hydro Flask has been more durable than any bottle I’ve used so far. It is extremely frustrating investing in a bottle to be refilled for repeated use, only for it to become dented beyond convenience after a short spell of months. This is also a very unsustainable practice, which results in many products that will never even begin to break down in our landfills. For these reasons, I have enjoyed using the Hydro Flask and it has lived up to the hype that has been created around it.
    Date published: 2019-02-20
    Rated 5 out of 5 by from Keeps water cold I bought this a couple weeks ago and never placed it down ever again. It goes everywhere with me from class to the gym or just in my study table
    Date published: 2019-02-13
    Rated 5 out of 5 by from Texture, weight and functionality is perfect I like it better than my Yeti with no doubt. The mouth opening is perfect size for ice and not spilling.
    Date published: 2019-02-13
    Rated 5 out of 5 by from Perfect size, love the style I have had a 32oz wide mouth straw lid for a few years and have loved it. I wanted something a little smaller and a friend proclaimed the wonders of her standard mouth so I thought I would give it a try. I love, love it. It is a lighter to carry around when it is full, a great size and a good color.
    Date published: 2019-02-13
    Rated 5 out of 5 by from 21 oz flask Excellent products keeps so old and also keeps so hot Great products from young to okd
    Date published: 2019-02-12
    Rated 5 out of 5 by from built to last this bottle has become a staple! perfect size for cup holders and bookbag holder.
    Date published: 2019-02-12
    Rated 5 out of 5 by from Good Product Great product made of solid materials. My favorite thing is that for what dispensers you can look into the hydro flask and tell when it's getting full. Retains temperatures really well too. The lid's top is also great for carrying it around.
    Date published: 2019-02-11
    Rated 5 out of 5 by from Love my Badger Red Hydro Flask! I love the size of my newest Hydro Flask! It is easy to throw into my purse, knitting bag, or backpack! It keeps my water cold and easily accessible!
    Date published: 2019-02-10
    Rated 5 out of 5 by from Aesthetic and durable I am really happy with this bottle, it keeps my water cool throughout the day and feels nice to hold. Pretty durable as, unfortunately, I dropped mine (full with water) at about waist height and it now has a gnarly dent in it. Regardless, the interior insulation is still intact.
    Date published: 2019-02-06
    Rated 5 out of 5 by from Changed my life! I bought this just a few weeks ago, but just in this short time, I now have the ability to get hydrated on the go better than ever! It keeps my water cool literally and figuratively. I LOVE YOU HYDROFLASK!
    Date published: 2019-02-05
    Rated 5 out of 5 by from Very good purchase I’m so happy that I bought my Hydro Flask . I like how it keeps my water all day cool
    Date published: 2019-01-30
    Rated 5 out of 5 by from I love it omg it’s so nice I recommend! I just have one issue but I think it’s just with me and my mouth to water bottle connection but when ever I drink the water and it would spill but uh yeah lol
    Date published: 2019-01-28
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  • 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: 2018-01-29

    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: 2018-01-24

    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: 2018-01-15

    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: 2017-12-29

    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: 2018-07-13

    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: 2018-01-14

    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: 2018-02-23
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