The Hydro Flask 21 oz equipped with Standard Mouth Insulated Sport Cap is the perfect go-anywhere companion on your busiest days. 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
- 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 our Standard Mouth Flex Cap
- Lifetime Warranty
- Sport Cap is not intended for use with hot liquids and is not leakproof