Hydro Flask 21 oz Standard Mouth Sport Cap

Hydro Flask 21 oz Standard Mouth Sport Cap
  • Color: Frost
  • Color: Pacific
  • Color: Watermelon
Please select options


Hydration on the go.

They're pretty much the perfect pair—the 21 oz Standard Mouth Bottle and the 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.

  • Versatile, middle-of-the-road size, equipped with our insulated Sport Cap
  • TempShieldTM 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.
Volume621 mL
Mouth Diameter1.91"
Weight11.3 oz


Hydro Flask: Ready for Any Adventure

Part Numbers

Option UPC Store SKU
Watermelon 810911034519 BOT6050713N