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Standard Mouth
21 oz Standard Mouth w/ Sport Cap
$26.96
Regular Price $35.95
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Standard Mouth

21 oz Standard Mouth w/ Sport Cap

21 oz Standard Mouth w/ Sport Cap is rated 4.4 out of 5 by 548.
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$26.96
Regular Price $35.95
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 have a friend with flexible measuring tape measure the distance between your C7 vertebra and the imaginary line between your thumbs. That’s your torso measurement. If you are between pack sizes, go with the smaller size.

  2. 2. Hip Measurement

    While 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

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<h2>Hydration on the go.</span></h2> <p>They're pretty much the perfect pair—our 21 oz Standard Mouth Bottle and our insulated Sport Cap. Together, they're your go-anywhere hydration companion. It stashes easily in a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough to keep you going for hours without weighing you down.</p>

Hydration on the go.

They're pretty much the perfect pair—our 21 oz Standard Mouth Bottle and our insulated Sport Cap. Together, they're your go-anywhere hydration companion. It stashes easily in a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough to keep you going for hours without weighing you down.

Hydration on the go
21 oz Standard Mouth Bottle w/ Sport Cap | 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 flavor 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.

Proprietary Powder Coat
Details
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Product Benefits

  • Versatile, middle-of-the-road size, equipped with our insulated Sport Cap
  • 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 our Standard Mouth Flex Cap
  • Lifetime Warranty
  • Sport Cap is not intended for use with hot liquids and is not leakproof

Size & Dimensions

21 oz
Volume 621 mL
Mouth Diameter 1.91"
Diameter 2.87"
Height 10.4"
Weight 11.3 oz
Technology
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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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Let's Go!

Today is wide open. You lead, we'll follow.

#HeyLetsGo

Hydro Flask supports non-profit organizations focused 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 donated donated.
  • 26,043 Bottles donated bottles.
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Reviews
Rated 5 out of 5 by from Great Color! This was a Christmas gift for my daughter. She loved it!
Date published: 2021-01-12
Rated 5 out of 5 by from Keeps water cold for hours I purchased 6 for my sons family this Christmas They all loved them as much as I do. I have tried several water vessels and didn’t like any till Hydro Flask I highly recommend getting one It is worth the money
Date published: 2021-01-11
Rated 5 out of 5 by from Blue flask Bought for a ten year old girl. I added a watermelon boot. She loved it!!
Date published: 2021-01-07
Rated 5 out of 5 by from The Best Cup I bought this one for myself and I also have a small one my daughter bought me.
Date published: 2021-01-06
Rated 5 out of 5 by from Great Buy! Perfect bottle for the kids out in the field of sports.
Date published: 2021-01-04
Rated 5 out of 5 by from Size is just great for me. I bought this bottle for me & I love it. I have another bottle also.
Date published: 2021-01-01
Rated 5 out of 5 by from Awesome I bought this for my 5 year old. It’s his new favorite cup!
Date published: 2021-01-01
Rated 5 out of 5 by from Great water Bottle! I have had my hydro flask for years!! I decided to my the smaller 21 ounce bottle and I am loving it!
Date published: 2020-12-28
Rated 5 out of 5 by from Perfect size for my 6 year old Easy to carry, holds enough water for the day without being too bulky or heavy.
Date published: 2020-12-28
Rated 5 out of 5 by from Great for sports I bought this for my kid for basketball and he absolutely loves it and it’s not difficult to clean
Date published: 2020-12-28
Rated 5 out of 5 by from Love! Got this for my daughter for Christmas. She loves the color and the style
Date published: 2020-12-28
Rated 5 out of 5 by from Perfect Gift! I bought this as a gift and she was in love with the color!
Date published: 2020-12-27
Rated 5 out of 5 by from Great bottle Very convenient, whether in the car or on our walks.
Date published: 2020-12-27
Rated 5 out of 5 by from Perfect Bought this gift for my nephew and he absolutely loves it!
Date published: 2020-12-26
Rated 5 out of 5 by from Loved my the granddaughter My granddaughter was so excited to get the hydro flask for Christmas.
Date published: 2020-12-26
Rated 5 out of 5 by from Works great This is my second hydro flask. I use it when I go to the gym and it keeps the water cold
Date published: 2020-12-03
Rated 5 out of 5 by from Hydro Flask quality is the best! Bought as a gift, they loved it! The frost color is gorgeous!
Date published: 2020-12-01
Rated 5 out of 5 by from Great colors, style, and durability! I love hydro flask for keeping my liquids cold all day. I use mine each and every day, and it's great for biking and hiking too! Thanks for offering a great product!!
Date published: 2020-11-15
Rated 5 out of 5 by from Great purchase This bottle is such a great addition to my little hydro collection o have going on. This is my 6th or 7th hydroflask and I tend to realize that I lean towards the 21 oz bottles. They are light and easy to carry in your hand and this sport cap is great for me as I work out very often. A great bottle overall and I was so lucky to get it on sale!
Date published: 2020-11-08
Rated 5 out of 5 by from amazing ! nice to take out to the gym and go hiking. keeps me hydrated all day
Date published: 2020-11-07
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Questions

Is this the hydro flask 2.0?

Asked by: aubz
Yes
Answered by: Consumer Service
Date published: 2020-11-11

When is the frost 21oz standard mouth bottle coming again. Is it going to be on sale again when it comes out.&nbsp;

Asked by: Andrea0412
Hello, I do apologize for the longer response time! We are not able to ensure if or when a color will come back!
Answered by: Consumer Service
Date published: 2020-11-05

So I have been wanting to buy I hydro flask for I really long time. So my dad told me I could buy one I like the 21 oz standard mouth bottle w/ sport cap l Hydro flask. So this is my question does the hydro flask 21 oz come with the sport cap or no lid.&nbsp;

Asked by: Andrea0412
Hello, I do apologize for the longer response time! You would want to make sure you select the correct bottle on the website. They do have the option to include the sports cap!
Answered by: Consumer Service
Date published: 2020-11-05

Does this bottle fit in most car cup holders?

Asked by: AC3215
Hello, I do apologize for the longer response time! Yes, the standard bottles tend to fit more in the standard size cupholder!
Answered by: Consumer Service
Date published: 2020-12-13

Per your answer on china vs USA manufacturing which lids are made in the USA?

Asked by: Randomman
All of our products are manufactured in China, but distributed from our US warehouse.
Answered by: Consumer Service
Date published: 2020-11-05

Are all Hydro Flasks dishwasher safe?

Asked by: mama P
No, only the new 2.0 bottles are dishwasher safe. You can reach out to us at 888-584-9376 to determine if your bottle is dishwasher safe or not.
Answered by: Consumer Service
Date published: 2020-08-27

I would like to know if you guys still sell the mint colored 21oz standard mouth bottle. Also, do you guys bring back old colors? It was my favorite but I lost it and I can't see myself without that lovely color!

Asked by: Jess15
At this time we are not making the Mint color. Product colors are based on consumer feedback. I will forward your suggestion over to our product development team.
Answered by: Consumer Service
Date published: 2020-02-03

Can I order this bottle but with the flex-cap? I noticed that they don't offer the 21oz Standard Mouth w/ flex cap in the &quot;frost&quot; color.

Asked by: kyororo
The 21oz standard flask that comes with the flex cap is currently out of stock in the color Frost. Please contact customer service at 888-584-9376 to discuss this further.
Answered by: Consumer Service
Date published: 2019-10-30
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Hydro Flask supports non-profit organizations focused 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 donated donated.
  • 26,043 Bottles donated bottles.
You May Also Like
  1. Standard Mouth Flex Cap
    $7.46
    Regular Price $9.95
    Standard Mouth Flex Cap - Black
    Colors Available
  2. Small Tag Along Bottle Sling
    $17.48
    Regular Price $34.95
    Hydro Flask Small Tag Along Bottle Sling - Goldenrod
    Colors Available