Overview
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.
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 |
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.
Proprietary Powder Coat
Comfortable and durable.
Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.
BPA-Free
Sip and enjoy.
Our products are BPA-free for ultimate purity. Stay refreshed and worry-free.
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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Overview & Specs
Overview
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.
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
-
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.
-
Proprietary Powder Coat
Comfortable and durable.
Our proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.
-
BPA-Free
Sip and enjoy.
Our products are BPA-free for ultimate purity. Stay refreshed and worry-free.
-
Lifetime Warranty
We stand behind our products.
Hydro Flask guarantees this Hydro Flask product with a limited lifetime warranty against manufacturer defects.
Video
Reviews/Q&A
Related Products
Reviews
Q & A
- 21 oz Standard Mouth w/ Sport Cap is rated out of 5 by 346.Rated 5 out of 5 by Butterfly12 from Awesome color red My son purchased this and he absolutely loves it!!!Date published: 2019-10-12Rated 5 out of 5 by madblade from the greatest water bottle to exist I bring this with me every where I go!!! It is perfect for any drink! Plus the color is so cute!Date published: 2019-10-11Rated 5 out of 5 by Anada from Love it!! Perfect size for an everyday bottle. I like the sports kid a lot, though u forgot that it does leak. Great product!Date published: 2019-10-08Rated 5 out of 5 by lovemywater from Love the water bottle and color! I was apprehensive about purchasing this water bottle based on price. However, I am very pleased with it! It keeps my water ice cold for hours on end, and I’m the color is vibrant and cool. I highly recommend the sport cap too. Never leaks and makes drinking easier.Date published: 2019-10-07Rated 5 out of 5 by J Rock from Best water bottle ever! This is the best water bottle I’ve ever had, however everybody in school makes fun of me for having it... saying I’m a “vsco girl”. I don’t even know what that means.. I’m a guy!Date published: 2019-10-03Rated 5 out of 5 by Manal from I love it I bought it a month ago and I love it. I’ve started to drink much more water since getting my hydro flask.Date published: 2019-10-03Rated 5 out of 5 by guliand from Love it I bought this for a gift and the feedback from the now-owner is: "I LOVE MY HYDROFLASK" - she tells me that everyday!Date published: 2019-10-02Rated 5 out of 5 by Shalanda from My daughter absolutely loves the flask This was a birthday gift for my daughter! We purchased the yellow color flask and the color is very sunshine and beautiful.Date published: 2019-09-29Rated 5 out of 5 by Brayden from The Best! I bought this for my teen age sons birthday. It keeps his water ice cold all day long even in ninety degree temperatures. There is even still ice in the bottle at the end of the day. Awesome!Date published: 2019-09-26Rated 5 out of 5 by Ooooooooorilsyz from Amazing!!! This water bottle stays so cold!!I left it on the beach in 98 degree weather for 13hours and it was fineDate published: 2019-09-26Rated 5 out of 5 by Doc 1942 from Black hydro flax Love it! Keeps my morning coffee hot all day. Also, keeps water cold for several days. I carry it with me and it’s on my nightstand at night.Date published: 2019-09-25Rated 5 out of 5 by Betrty from Great waterbottle! I love this water bottle and have been using it for almost 2 years! Great quality!Date published: 2019-09-24Rated 5 out of 5 by Nelly from Secured I bought this bright one and ever since it's the only bottle that suits me and I take everywhereDate published: 2019-09-21Rated 5 out of 5 by gabs123 from Amazing bottle I got this as a gift and I love it sooo much. This kept my tea hot for hours!! I also put my iced coffee in this and it was cold the whole day!! Love this definitely getting more!!!Date published: 2019-09-21Rated 5 out of 5 by garcie082705 from Good lis I bought this a year ago and it’s amazing.I love the colors and the this is the perfect size for running errands. The lid gets a little dirty but it works greatDate published: 2019-09-20Rated 5 out of 5 by Mwee from Good water bottle Keeps water cold and other water bottle that I had in the pass, water has came out from the mouth cap but this one keeps the water in.Date published: 2019-09-20Rated 5 out of 5 by Jjtavor from Super Durable I’ve been using hydroflasks for almost 5 years and I’ll never use another brand again!Date published: 2019-09-20Rated 5 out of 5 by JacksonB from Looove! Keeps water cold all day. Could NOT be happier with my purchase :)Date published: 2019-09-20Rated 5 out of 5 by Ljkahdndmd from AMAZING BOTTLE! I love my hydro flask because it keeps my water cold all day and my ice doesn’t even melt!Date published: 2019-09-20Rated 5 out of 5 by cgordon4 from Love it! Literally the best! Idk how I lived life without itDate published: 2019-09-20
Can anyone recommend a bike cage for this bottle? I tried a plastic one to hold the bottle but the bottle was too heavy for the plastic and broke. I now have a metal cage but the metal on metal makes a lot of noise while riding my bike.
We regret to inform you that our products are not specifically designed to be carried in bike cages and they have not been tested for such use. We would be concerned about the possibility of the cage causing scratches, chips, and dents to your flask from improper fit and jostling. Therefore, we do not recommend carrying Hydro Flask products in bike cages.Date published: 2019-06-07Is anything being done about the leaky sports lid? I wanted to get one for my husbands birthday.
If the cap starts to leak, 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/)Date published: 2019-06-06I see several complaints about the sports cap leaking. I want a cap that you don't have to unscrew to drink from and need the standard size to fit into my cupholder. Anyone have good experience with the sports cap or recommendations for a different one?
The Standard Mouth Sports cap is NOT advertised as leak proof, and there is potential for dripping if overturned or shaken. If transporting your flask in a situation where it may not remain upright or could be jostled, we recommend using a sealed lid such as the Flex Cap.Date published: 2019-06-06Do I need to purchase a straw for this water bottle or is the included sport cap all I need?
The sports cap is made to be tilted up to drink from.The product does not come with a straw included.Date published: 2019-06-01Does it have a straw in it?
The Sports Cap just has the spout. It does not have a straw in the lid.Date published: 2019-05-31Which bottle best fits into a bicycle water bottle cage holder? Could you please include photos of bicycles with a hydroflask in the bottle cage? It would be so much more helpful than your standard response to this question on the FAQ page.
I use the 21 oz bottle with the flex cap in my bike holder and I believe the 24 oz would also fit since it’s just taller.Date published: 2019-05-07I’m planning to order a hydro and would love to put stickers on it. What is the area of this hydro so I’ll know how many stickers to order? Thanks!
Quinlan21, Product dimensions can be found on our FAQ page. You can see them here: http://www.hydroflask.com/frequently-asked-questions/Date published: 2019-05-07Will a straw lid be available for the 21oz HF?
We do not currently manufacture a product that matches your request, but we’ll document your suggestion for future consideration by our Product Development Team.Date published: 2019-01-11
