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Hydro Flask® 21oz Standard Mouth Flex Cap Water Bottle

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Sale price $34.99

Leaves our warehouse in 2 business days.

Color Dew

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Water is ancient. The same waters that existed millions of years ago are still here today. Taste the prehistory of H2O by way of the 21oz Standard Mouth Flex Cap Water Bottle from Hydro Flask. This bottle is sleek and stylish and will do the trick to keep your camper hydrated during all their outdoor adventures at summer camp. And, with durable stainless steel construction, this bottle can take the coarse conditions of summer camp and remain intact.

With its innovative Flex Cap, this bottle offers a comfortable grip and a convenient carry handle. The Flex Cap also has a leak-proof seal so you know your child's water won't spill all over their backpack. The TempShield™ insulation technology will keep their drinks cold for up to 24 hours or hot for up to 12 hours. The standard mouth opening makes it easy to drink from and fill up with ice cubes.



  • Material: 18/8 Pro-Grade Stainless Steel
  • 21oz Standard Mouth Bottle
  • TempShield® Double-Wall Vacuum Insulation Maintains Temperature
  • Insulated Flex Straw Cap is Leakproof when Closed
  • Made with  for Durability, Pure Taste and no Flavor Transfer
  • Color Last™ Powder Coat is Durable, Sweat-Free and Colorful
  • BPA-Free
  • Dishwasher Safe
  • Flex Straw Cap not Intended for Hot Liquids
  • Not for use in Microwave, Freezer, or on Stovetop


In late 2012, Hydro Flask moved beyond what was, at the time, the industry’s standard vacuum sealing process as it involved lead. Though it was “the industry standard”, the folks at Hydro Flask knew it could be harmful so they invested time and energy to pioneer a new process of vacuum sealing. It was more complex and more expensive, but it didn’t involve lead. Always aiming for a higher standard, Hydro Flask is pleased to have made this choice on behalf of the health of their consumers, manufacturing partners, and the environment.

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