21 oz (621 ml) Standard Mouth
21 oz Standard Mouth is rated 4.7 out of 5 by 772.
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£31.95

21 oz (621 ml) Standard Mouth

21 oz Standard Mouth is rated 4.7 out of 5 by 772.
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£31.95
Size Chart
Hydro Flask Pack Size Chart
Available Sizes S/M M/L
Torso
Measurement
18 - 19 in 19 - 22 in
43 - 48 cm 48 - 56 cm
Hip
Measurement
22 – 46 in 26 – 46 in
56 – 117 cm 66 – 117 cm
  1. 1. Torso Measurement

    • A. Bring your chin to your chest and feel for the most prominent bony bump where the slope of your shoulders meets the back of your neck. This is your C7 vertebra and the top of your torso measurement.

    • B. On each side of your body, feel for the top of your hip bones, just below the sides of your ribs. With fingers pointing forward and thumbs pointing backward, draw an imaginary line between your thumbs. This is the bottom of your torso measurement.

    • C. Stand up straight and ask a friend to measure the distance between your C7 vertebra and the imaginary line between your thumbs using a flexible measuring tape. That’s your torso measurement. If you are between pack sizes, go with the smaller size.

  2. 2. Hip Measurement

    Although your torso measurement is the best indicator of your pack size, it’s still important to check your hip size when using a hipbelt. To find your hip measurement, wrap a flexible tape measure around the top of your hip bones, just below the sides of your ribs. This measurement is slightly higher than your waistline

<div class="description-pdp-content-text"> <h2>Your perfect travel companion.</h2> <p>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. </p></div>

Your perfect travel companion

Keep life moving with our 21 oz (621 ml) 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.

21 oz (621 ml) Standard Mouth Lifestyle Image
21 oz (621 ml) Standard Mouth Insulated Water Bottle | Hydro Flask
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Features
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TempShield™

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.

TempShield
Pro-Grade Stainless Steel

Pro-Grade Stainless Steel

Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavour transfer – and the durable construction stands up for whatever life brings.

Proprietary Powder Coat

Our proprietary powder coat means an easy-grip, sweat-free and extra-durable bottle that you can take anywhere.

Cold Flow System
Details
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Product Benefits

  • Versatile, middle-of-the-road size
  • TempShield™ insulation eliminates condensation and keeps beverages cold for up to 24 hours and hot for 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 and Dimensions

21 oz (621 ml)
Volume 621 ml
Mouth Diameter 1.91"
Diameter 2.87"
Height 9.4"
Weight 11.3 oz (320 g)
Technology
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We have great faith in our products

Hydro Flask guarantees this product with a limited lifetime warranty against manufacturer defects.

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Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:

  • 92 Non-profits supported non-profits.
  • $1.5 million Dollars (approx. £1.197 million) donated donated.
  • 26,043 Bottles donated bottles.
You May Also Like
  1. £9.50
    Standard Mouth Insulated Sport Cap
    Colours Available
  2. £8.00
    Small Flex Boot
    Colours Available
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Reviews
Rated 5 out of 5 by from Luv Luv Luv I’m enjoying my Mello Yellow bottle it’s keeps my dinks super cold.
Date published: 2020-10-07
Rated 5 out of 5 by from Everything Good I bought this 5 years ago and it still in great shape.
Date published: 2020-10-06
Rated 5 out of 5 by from Good water bottle I use this probably everyday. It keeps liquids cold for a pretty long time.
Date published: 2020-09-18
Rated 5 out of 5 by from This is the best water bottle I’ve ever had I’ve had this bottle for almost a year and it still works perfect definitely worth the price
Date published: 2020-09-18
Rated 5 out of 5 by from The BEST! My daughter absolutely LOVES this beautiful Watermelon color Hydro Flask bottle that I gave as part of her birthday gift! Suits her needs perfectly. Just the right size for work and fits perfectly in her car car cup holder!
Date published: 2020-09-13
Rated 5 out of 5 by from Keeps water cool! Great product. Fits regular carrying device. So nice to have cool water in AZ after multiple hours
Date published: 2020-09-01
Rated 5 out of 5 by from I like it , what can I say Bought these (2) to replace "plastic" bottles in which the water always tasted like plastic. Stainless interior of the Hydro Flask give a much clean taste.
Date published: 2020-08-29
Rated 5 out of 5 by from Great bottle I bought this bottle a month ago and all of my family have one we so happy with them
Date published: 2020-08-19
Rated 5 out of 5 by from My Ice Cubes Don’t Melt! This Hydro Flask keeps my water ice cold and my ice cubes don’t melt! I love my Hydro Flask!
Date published: 2020-08-17
Rated 5 out of 5 by from Just right I’m really pleased with this purchase, I love the way it feels and I like that it can actually keep my water cold.
Date published: 2020-08-02
Rated 5 out of 5 by from THE COLOR I’ve been wanting to order one for so long and I seen this color and couldn’t resist!!! It’s so cute
Date published: 2020-08-01
Rated 5 out of 5 by from Great for cold drinks I love it. It’s not gray it more like a purple I love it
Date published: 2020-07-30
Rated 5 out of 5 by from Love that it keeps temperature! This is officially the coolest bottle I've ever owned! My sister had one and I decided to treat myself to one for my birthday. I was a bit surprised by the price, but the quality definitely makes up for it. My tea stays warm all day and my water keeps cold for a very long time. The longest I've had water stay ice cold was close to THREE days! Absolutely amazing! I've already purchased some for my siblings and mother.
Date published: 2020-07-28
Rated 5 out of 5 by from Love the color I love the color and the style it’s super cute and keeps my water so cold. I bit small for my liking but still great product.
Date published: 2020-07-28
Rated 5 out of 5 by from Happy I bought this for my granddaughter for her birthday. She love's it. She decorated it with stickers and has been using it for a month. I'm so glad she likes it so much.
Date published: 2020-07-23
Rated 5 out of 5 by from It’s fantastic! Love this! Keeps the ice in my drink all day! I loved it so much I ordered another larger one and am about to give a couple as gifts!
Date published: 2020-07-19
Rated 5 out of 5 by from Hibiscus is amazing!! Bought this hydro flask for my girlfriend who got me into them. She loved the bright colors and everyone compliments her on it!!
Date published: 2020-07-12
Rated 5 out of 5 by from Excellent Bottle I love it! It keeps my drinks cold all day long. Especially love the color.
Date published: 2020-06-28
Rated 5 out of 5 by from Hydro Flask 21 oz Standard Mouth - Black Amazing product. Bought 2 of these to carry on my motorcycle. This size and diameter fit perfectly in my front saddlebag holsters. Chilled both bottles overnight in the refrigerator, prior to my trip, the next day. Added approx. 6 ice cubes and topped the bottles off with iced tea. Left at noon and rode all day. Got home late and forgot to take bottle off of bike when arriving back home. Retrieved the bottles around noon the next day and when opening up the bottles, I found the ice had melted, but the tea was still cold! Bottles never sweated on the outside. Leather holsters were nice and dry. Bought a Sport cap to try on one of the bottles. The rubber seals tight, never leaked, but too tight to use while going down the road. My riding partner has the same bottles and uses the other flip-up spout on his bottles. They worked great and also never leaked. Able to flip up and use while going down the road. The Sport cap has a rigid loop across the top. This causes the bottle to stick up a little higher than with either the flip-up spout, or standard cap. If you have a passenger on the back, this may interfere with the back of their leg. Don't know for sure. 18 oz. bottle (approx. 1-1/2" shorter) may work better, or stick with the flip-up spout and it should be fine. Overall...very pleased and satisfied with this product. Nice tough powder-coated outside finish, should last a lifetime, in my application. Would definitely purchase again.
Date published: 2020-06-27
Rated 5 out of 5 by from Cool! Love my Hydro Flask! My daughter requested one as a birthday present, so I decided to order one for myself. I am not disappointed! I love how it keeps the water cool for quite some time. The water taste fresh and clean. Thank you for such a great product!
Date published: 2020-06-26
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Questions

Are any of the water bottles&nbsp;dishwasher safe?&nbsp;

Asked by: SEO1
According to the Dick's Sporting Goods packaging my 24 oz small mouth i just received is dishwasher safe? Amazon is also reporting they're dishwasher safe. But I see no marking on the bottom that says it's dishwasher safe. Please explain
Answered by: Tom Rufo
Date published: 2020-07-01

I am getting a metallic taste in my water from the 21 oz flask. I&rsquo;m surprised as it has 18/10 stainless steel. Is there anything that would get rid of this? &nbsp;

Asked by: David Werner
We understand how frustrating treating odors can be, but we have a quick trick to battle the issue: Mix 2-3 Tablespoons baking soda with a small amount of warm water to form a paste. The paste is a nonabrasive scrub and deodorizer. Rinse the flask with warm water. Then wash with regular dish detergent.
Answered by: Consumer Service
Date published: 2020-02-17

Can I use the lid with the straw for coffee in the standard mouth 24 oz bottle

Asked by: Reacher
Our Wide Mouth Straw Lid is compatible with all of our Wide Mouth Bottles. Unfortunately, the 24 oz bottle is a Standard Mouth and is not compatible. We have our Standard Flex Cap and Standard Sports Cap that will fit the 24 oz bottle.
Answered by: Consumer Service
Date published: 2020-01-27

Where is this bottle manufactured?

Asked by: j1234
Manufactured in China but shipping from Southaven, MS.
Answered by: Consumer Service
Date published: 2020-07-28

Is there a cap available for purchase that would allow me to use my standard mouth Hydro Flask 21oz with hot drinks? I purchased 2 hoping to use one for hot and the other for cold. However I have not been able to use hot drinks due to the cap. Frustrated

Asked by: Limey
We currently have two caps for the standard mouth flasks. We have the sports cap and the flex cap.
Answered by: Consumer Service
Date published: 2019-11-03

The jade color was available yesterday, but is not now. Will it be available again?

Asked by: Lindsayb
I apologize for the issue you are having. Please contact customer service at 888-584-9376 to discuss this further.
Answered by: Consumer Service
Date published: 2019-10-29

Can big pieces of ice fit in the standard mouth cap

Asked by: unknown123456
The mouth diameter is 1.91 inches. Ice cubes smaller than this will fit.
Answered by: Consumer Service
Date published: 2019-10-29

how do i add this to my wishlist?

Asked by: maroonscrunchie8
Unfortunately, our website does not have an option to add to a wish list.
Answered by: Consumer Service
Date published: 2020-05-02
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Hydro Flask supports non-profit organisations focusing on building, maintaining, restoring and providing better access to parks. Since 2017, we have been doing just that:

  • 92 Non-profits supported non-profits.
  • $1.5 million Dollars (approx. £1.197 million) donated donated.
  • 26,043 Bottles donated bottles.
You May Also Like
  1. £9.50
    Standard Mouth Insulated Sport Cap
    Colours Available
  2. £8.00
    Small Flex Boot
    Colours Available