Hydro Flask Standard Mouth Insulated Water Bottle with Flex Cap - 21 oz

The 21-ounce insulated water bottle is one of Hydro Flask's best-sellers, for its standard size and versatility. It perfectly fits in the side pocket of your backpack or in your car’s cup holder, making hydration always within reach. The Flex Cap securely closes to prevent leaks and spills while on the go, and the standard mouth width offers easy sipping without spilling.