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.
Two words that kick off every adventure.
#HeyLetsGo
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 101.Rated 5 out of 5 by Tarra from Wonderful Bought two weeks ago. I use it for shakes Love it doesn’t leak, easy grip !!!Date published: 2019-07-17Rated 5 out of 5 by Karen14 from Nice color I’ve been wanting a hydro flask for some time now and I finally got it and it’s the best. The only problem was the bottle cap which doesn’t fully close and spills easily. It’s also a little hard to open the cap.Date published: 2019-07-15Rated 5 out of 5 by iimhanna from in love with this. i bought my hydro flask probably about a month ago because a friend had one and i thought it was nice. it’s a little pricey but definitely worth it! (it also arrived quickly)Date published: 2019-07-14Rated 5 out of 5 by lydia from amazing bottle i bought this about 2 weeks ago and it is one of the sturdiest things I've ever owned I'm so glad i bought it, it was totally worth itDate published: 2019-07-09Rated 5 out of 5 by Mikeya from Works great I can put it in my truck at 9 in the morning and the water is still cold by 4 in the afternoonDate published: 2019-07-08Rated 5 out of 5 by Dmc7117 from Great insulation My husband & I have used them for 3-4 yrs. & don't leave home without them! Because my grandchildren always want to drink out of mine, I am purchasing one for each of them for their birthdays!Date published: 2019-07-04Rated 5 out of 5 by eminemily from Love it Use everyday keeps water cold all day! Still ice after 6 hoursDate published: 2019-06-23Rated 5 out of 5 by dymnd from Perfect for everything I’ve had my hydro for a couple weeks now and i am in love with it, my only thing is i can’t figure out how to get the taste of metal to go away lol but i am cedy happy with it and would recommend itDate published: 2019-06-21Rated 5 out of 5 by Momstarr from Perfect for taking to workouts I take it to the gym everyday. Keeps my water cold. There isn’t any after taste in the water like I have had with other products. My only wish is I would have bought the 24 oz instead!Date published: 2019-06-19Rated 5 out of 5 by Anonymous from awesome color! I am very happy with my Hydro Flask .Love the color, love that it keeps my water chilled for the longest time.Date published: 2019-06-18Rated 5 out of 5 by kmu1 from amazing i really love the water bottle, keeps my drinks cold for a long period of time. however it seems as if the sports cover scratched up the lip of my bottle. the entire outside lip is all cut up, which is surprising.Date published: 2019-06-17Rated 5 out of 5 by CamJ427 from Great! I’m so happy with my hydroflask. It’s great for keeping you hydrated throughout the day. I wanted to start being healthy and drinking water was my first step! It’s good for school, work, the gym, or anywhere. The only problem I have with it is that the sports cap leaks a little bit but it’s not meant to be put away because you’re always supposed to be drinking water. :)) it keeps your drink cold for hours. The ice barely melts. this was my first big girl purchase that I bought wit my money and Im so happy I bought it.Date published: 2019-06-07Rated 5 out of 5 by Human Hotsauce from Perfect Bottle I bought this for my daughter to take to tennis. It is the perfect size to fit in her backpack at school and in the cup holder of her car. It keeps her water cold all day. The color is adorable!Date published: 2019-05-29Rated 5 out of 5 by Devmar28 from My 3rd hydroflask! This is my third hydroflask! The 18 ounce I have is a bit too small for outings and the 40oz is beat up since I use it so much. I actually asked for this one for my birthday from my parents, it’s the perfect size for when I start school in the fall. And the color is beautiful!Date published: 2019-05-29Rated 5 out of 5 by JessH from Love it! This flask keeps my water cold all day, fits in the side pocket of me pack and the holders on the machines at the gym. I love the pop top spigot for drinking while I work out.Date published: 2019-05-26Rated 5 out of 5 by scala from Great addition to our collection I bought this for my wife’s birthday. She loves it. Great color, excellent product.Date published: 2019-05-12Rated 5 out of 5 by abock7 from Keeps things cold I bought my hydro Flask in April it keeps things very cold and by the end of the school day the ice is still their. The sports cap works very good and provides a great amount of water. In all my hydro flask is a great product and I would definitely recommendDate published: 2019-05-08Rated 5 out of 5 by Kgirl29 from So pretty! I love my hydro flask and I recommend it to everyoneDate published: 2019-05-05Rated 5 out of 5 by brsue63 from Keeps my cold water cold. This is my second Hydro Flask and the color is an "eye catcher". Its perfect for taking to the gym.Date published: 2019-05-04Rated 5 out of 5 by grace24 from Love the bottle! A family member bought this for me and I am so glad that they did! It’s the perfect size for school and it keeps my water cold and my ice frozen all day long. Love the color! The only complaint I have is that I wish I didn’t have to unscrew the lid every time I take a drink, but I don’t like the sports cap and I would rather use the lid with the pop-up straw. Does anyone know if they make a straw lid for the standard mouth? I see they make it for the wide mouth bottles, but I don’t see one for the standard mouth. Anyone know?Date published: 2019-05-01
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
