Hydro Flask Standard Mouth 21 oz. Bottle with Flex Cap product image
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Hydro Flask Standard Mouth 21 oz. Bottle with Flex Cap

Capacity: 21 oz
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Product Information

Perfect for functional use, the Hydro Flask® 21 oz. Standard Mouth Bottle with Flex Cap makes the perfect hydration companion. The double wall vacuum insulation keeps your hot beverages hot for up to 12 hours, and your cold drinks cold for up to 24 hours. Made from durable food-grade stainless steel with a powder-coated finish, the 21 oz. bottle features sweat-free construction for easy grip in any conditions.


  • Hydration bottle for the trails and everyday use
  • Capacity: 21 oz.
  • Standard mouth opening for easy, on-the-go drinking
  • Durable, powder-coated design
  • Constructed with 18/8 pro stainless steel
  • BPA free and phalate-free
  • Includes lid for easy transport
  • Hand wash


  • Double wall vacuum insulation
  • Keeps hot beverages hot up to 6 hours and cold drinks cold and refreshing for 24 hours
  • TempShield™ protected sweat-free finish
  • Also compatible with Hydro Flask® Wide Flat Cap, Hydro Flip Lid and Wide Straw Lid

Additional Details

  • Manufacturer’s lifetime warranty
  • Model: S21SX
  • Brand : Hydro Flask
  • Country of Origin : Imported

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