21 oz Standard Mouth

Colder. Hotter. Longer.

Hydro Flask's unique double wall vacuum insulation protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure.

Your perfect travel companion.
Keep life moving with a Hydro Flask 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 their bestselling water bottles.

TempShield™
The unique double wall vacuum insulation design protects temperature for hours. Cold drinks stay icy cold and hot drinks stay piping hot so you can stay refreshed for any adventure. 

Pro-Grade Stainless Steel
Made with 18/8 pro-grade stainless steel to ensure pure taste and no flavor transfer - and the durable construction stands up for whatever life brings.

Proprietary Powder Coat
Comfortable and durable, the proprietary powder coat means an easy-grip, sweat-free, and extra-durable bottle that you can take anywhere.

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: