Hydro Flask Standard Mouth with Flex Cap - 21oz

One Size
Delivery - FREE over £70
Ordered before 8:00PM, DELIVERED TOMORROW
  • FREE 3-year extended warranty - With easy email sign up
  • Price match promise - With easy email sign up
  • Easy returns with Royal Mail collection or drop off
  • 100 day returns - With easy email sign up

Product details

  • Ideal use: Travel, camping, outdoor expeditions
  • Capacity: 21oz (621ml)
  • Materials:
    • 18/8 Pro Grade Stainless Steel
    • Durable, sweat-free powder coated finish
    • BPA Phthalate free
    • TempShield double wall vacuum insulation:
      • Keeps Hot up to 12 Hours
      • Keeps Cold up to 24 Hours
  • Ensures pure taste and no flavor transfer
  • Versatile, middle-of-the-road size
  • Standard Mouth opening
  • Supplied with Flex Cap
  • Dimensions: 26 x 7cm
  • Weight: 295g

Product information

The Hydro Flask Standard Mouth 21oz Bottle with Flex Cap is one of the most versatile water bottles available. With a convenient capacity and a generous opening, it is great for sports drinks or thicker liquids, and can happily accomodate ice cubes. Whether it's for a hot cup of tea on a mountain side or a refreshing gulp of water mid work-out, this flask will have your hydration needs covered.

Product features


Bottle material
Stainless steel


Volume (ml)
Bottle features
BPA free, Insulated, Leak proof, Suitable for hot drinks
Cap type
Screw cap

Other features

Hydro Flask
Ideal For
Athleisure, Festival Camping, Hiking, Travel
Outdoor accessories
Drinking Equipment



Let us know you agree to cookies

We use marketing, analytical and functional cookies as well as similar technologies to give you the best experience. Third parties, including social media platforms, often place tracking cookies on our site to show you personalised adverts outside of our website. We store your cookie preferences for two years and you can edit your preferences via ‘manage cookies’ or through the cookie policy at the bottom of every page. For more information, please see our cookie policy.