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

21 oz Standard Mouth w/ Sport Cap

21 oz Standard Mouth w/ Sport Cap is rated 4.4 out of 5 by 504.
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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

<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.

21 oz Standard Mouth w/ Sport Cap Lifestyle Image
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.

Cold Flow System
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
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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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 Perfect for school. I bought this a month ago for my daughter To use at school. It fits perfectly in her backpack.
Date published: 2020-09-18
Rated 5 out of 5 by from Love this! My daughter bought me one and I loved it so much, I bought everyone in my family one. We live in a dry area of the country and I love having ice cold water to keep everyone hydrated. And we don't use bottled water any more so no more piles of plastic bottles. Healthy for us and the environment!
Date published: 2020-09-16
Rated 5 out of 5 by from The color is awesome- keeps my drink ice cold I bought this to fit into my bike cage for long rides - and it certainly does the job
Date published: 2020-09-16
Rated 5 out of 5 by from My Wife Lives It! I bought the bottle and boot for my wife. She has always been jealous of me and my 21oz. HydroFlask. She has had other brands and has not been happy with them for one reason or another. She calls her new bright yellow HydroFlask, Perfect! Need I say more.
Date published: 2020-09-14
Rated 5 out of 5 by from LOVE LOVE LOVE This bottle is awesome! I LOVE the sport cap, it just leaks a tad, but no biggie! Always can count on my Hydroflask to keep my ice water, ice water!
Date published: 2020-09-14
Rated 5 out of 5 by from Lemon love Love lemon love the company. Quality product and the company cares about its customers. Important to still have a company and quality
Date published: 2020-09-13
Rated 5 out of 5 by from Loved it. Used it two days then lost it in a house fire.... ugh.
Date published: 2020-09-12
Rated 5 out of 5 by from Perfect for sports and school I bought this a few weeks ago right before school started and I’m so happy with it. My daughter gets so excited that her water stays cold all day at school! And the sport mouth is perfect for kids as well!
Date published: 2020-09-12
Rated 5 out of 5 by from Bottle I brought it for my sisters birthday and she loves it
Date published: 2020-09-10
Rated 5 out of 5 by from Love the color and the size One of many hydroflasks that I own. This one is perfect for my mini adventures.
Date published: 2020-09-05
Rated 5 out of 5 by from Amazing I’ve had this cup since Chrismas and it has no Detents or anything it’s is great condition highly recommend
Date published: 2020-09-03
Rated 5 out of 5 by from Ice cold always! I love this bottle and finally understand the hype. No matter where I am my water stays ice cold. I also love the sports cap!!
Date published: 2020-08-28
Rated 5 out of 5 by from a step above I bought 2 of these for my adult daughter and I. So happy I did, ice stays cold for more than 24 hours. Fits nicely in my car drink holder. The top is designed well and easy to grab with 1 finger and carry. I hesitated because it is a premium product which comes with a higher price but really the best thing for really ice cold water storage.
Date published: 2020-08-25
Rated 5 out of 5 by from Love the sport top, so easy to drink out of Couldn’t be more pleased , easy to drink and always cold
Date published: 2020-08-25
Rated 5 out of 5 by from Love the color and sport cap Perfect size for my daughters lunch box, keeps her water cold all day and the sport cap doesn’t leak and is super handy!
Date published: 2020-08-25
Rated 5 out of 5 by from The perfect bottle So happy with my purchase. Found my favorite color and it happened to be on sale. Keeps my drinks super cold and even when it’s all the way filled up it’s lightweight. Getting the sports cap was the cherry on top because i’m able to drink from it without taking the whole top off and i’m still able to carry it comfortably.
Date published: 2020-08-24
Rated 5 out of 5 by from Ice, ice, baby The ice can't melt in this thing! Makes a great gong noise when it bumps against things.
Date published: 2020-08-23
Rated 5 out of 5 by from Fantastic hydro flask This is an incredible bottle. Keeps water cold with just a little ice all day. Love love this water bottle. Worth every penny!
Date published: 2020-08-23
Rated 5 out of 5 by from Cold water—-finally! I bought my hydro flask about a month bag and I’m so happy with it. I’d tried other bottles that were supposed to keep water cold for long periods and was always disappointed. My hydro flask keeps my water cold all day long. I’m buying one for my daughter next!
Date published: 2020-08-21
Rated 5 out of 5 by from Awesome Love my hydro flask it’s a bright yellow and keeps my water icy.
Date published: 2020-08-20
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Questions

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: 2020-07-31

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

My bottle has a rattle has something broken inside?

Asked by: Javo123
The rattle you hear is a small metal disc that sits between the double wall of your flask that aids in the vacuum insulation process. If the disc becomes dislodged, you&rsquo;ll hear a small gritty noise or rattle. This will not affect the insulation or structural integrity of your flask.
Answered by: Consumer Service
Date published: 2019-10-30

Is the sports cap easy to open? My mom has arthritis and is looking for a water bottle she use easily.&nbsp;

Asked by: Katieroo
When the sports caps are brand new, they can be a little hard to open and close. I would recommend a wide mouth flask with a straw lid.
Answered by: Consumer Service
Date published: 2019-10-29

what lids can be used with this bottle besides the sports cap and the flex cap?

Asked by: timmothy
The Standard Mouth Sports Cap and the Standard Flex Cap are the only caps available for the standard mouth flasks at this time.
Answered by: Consumer Service
Date published: 2019-10-27

Are you able to put ice cubes in the standard mouth bottle or is it to narrow for ice cubes to fit through the top?

Asked by: Caterina
Normal sized ice cubes will fit in the standard flask.
Answered by: Consumer Service
Date published: 2019-10-27

So this bottle works w both the sports cap and the standard sized screw able lid?&nbsp;

Asked by: Kayla14
Yes
Answered by: Consumer Service
Date published: 2019-10-27
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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.
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