Made for Life on the Move
Your perfect travel companion, the Hydro Flask® Standard Mouth with Flex Cap 21oz is designed to keep up wherever life takes you. Compact and lightweight, it stashes easily into a small shoulder bag, your pack’s side pocket, or your car cup holder.

Just the Right Capacity
With enough capacity to hold hours of ice-cold refreshment without weighing you down, this 21oz bottle strikes the ideal balance between portability and performance. It’s no surprise it’s one of Hydro Flask’s bestselling water bottles.

Advanced TempShield™ Insulation
TempShield™ insulation eliminates condensation and keeps beverages cold for up to 24 hours and hot for up to 12 hours. Whether you’re commuting, traveling, or heading outdoors, your drink stays at the perfect temperature.

Clean, Durable, and Dependable
BPA-free and built for everyday reliability, this bottle delivers trusted performance in a sleek, easy-to-carry design. Simple to use and easy to love, it’s made to go wherever you do. Hand wash only.