21oz Standard Mouth With Flex Cap

About the Hydro Flask 21oz Standard Mouth with Flex Cap

As part of their hydration collection, the Hydro Flask 21oz Standard Mouth water bottle is perfect for keeping cold drinks cold and hot drinks hot - hour after hour.

Whether you're taking your morning coffee to the office, hiking through the mountains or simply heading to the gym, Hydro Flask's TempShield™ double-wall vacuum insulation ensures your beverage of choice tastes exactly how you want, for as long as you need it to.

A double-walled inner and outer chamber within the flask creates a vacuum to prevent heat transfer through conduction while the insulated Flex Cap lid prevents temperature change through convection. In addition, the inner chamber features a reflective lining for further heat retention. The result is a flask unrivalled in its ability to ensure optimal temperatures for your drink of choice: staying cold for up to 24 hours and hot for up to 12 hours.

The Hydro Flask 21oz Standard Mouth water bottle features the Flex Cap with a handy carry-loop for a travel-friendly design that's ideal for those constantly on the move. The circumference of the standard mouth design is effortlessly able to accommodate ice cubes, to give your beverage that extra chilled factor on long days.

Hydro Flask water bottles use 18/8 Pro-Grade stainless steel which is BPA-free. Hydro Flask is proud to offer a lifetime warranty with the 21oz Standard Mouth water bottle.

The Hydro Flask 21oz Standard Mouth water bottle is perfect for a busy day. Whether you're commuting or hiking trails, stay hydrated no matter the temperature.