Frontier Collapsible Cup down Works with all Hydro Flask

Works with all Hydro Flask straws and lids

and with Polygiene® odor control

Battery Duration MAX 10 h - MIN 1

Flip and sip

Get ready to power through uphills and descents with this mid-cut GORE-TEX version of the updated X-ULTRA 4

Frontier Collapsible Cup down Works with all Hydro FlaskBuilding on over a decade of experience in collapsible drinkware, the Frontier Collapsible Cup has been engineered to be sleeker, more ergonomic and lighter. Glass reinforced nylon 66 is used for the base, rim and center ring providing more stability and allowing you to grip the cup more easily. EU food grade silicone rubber sidewalls let the cup shrink down to less than 2cm in height. Designed to nest stack, these cups really do fit in anywhere