Hydro Flask 21 OZ Standard Mouth Flex Cap Black

Keep life moving with our 21 oz bottle and Standard Flex Cap. It stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder, and holds enough ice cold goodness to keep you going for hours without weighing you down. No wonder it's one of our bestselling water bottles.

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 Insulated Sport Cap

Lifetime Warranty

Size & Dimensions

21 oz

Volume 621 mL

Mouth Diameter 1.91"

Diameter 2.87"

Height 9.4"

Weight 11.3 oz