Hydro Flask 21 oz. Standard Mouth with Standard Flex Cap in Black
Hydro Flask 21 oz. Standard Mouth with Standard Flex Cap in Black
Hydro Flask 21 oz. Standard Mouth with Standard Flex Cap in Black
Hydro Flask 21 oz. Standard Mouth with Standard Flex Cap in Black

Hydro Flask 21 oz. Standard Mouth with Standard Flex Cap in Black

$34.95
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Shipping calculated at checkout.

Product Benefits

  • Versatile, middle-of-the-road size
  • 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 standard mouth caps
  • Lifetime Warranty

Size & Dimensions

21 oz
Volume 621 mL
Mouth Diameter 1.91"
Diameter 2.87"
Height 9.4"

The Buoy

Free Personalization

Our namesake... Fenwick Float-ors are authentic buoys painted in our studio. They are transformed into a decorative piece to celebrate life along the coast.  


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