The Orange Mud UltraFlask 500ml is built for trail runners, ultra endurance athletes, and anyone who demands reliable hydration on every mile. A body-conforming soft flask that shrinks as you drink, fits any vest or belt pocket, and locks tight when you need it most.
Why Athletes Choose the UltraFlask 500ml:
No-Slosh DesignCollapses as you drink to reduce sloshing and maintain stability in motion. No distracting noise, no shifting weight.
Locking Bite Valve42mm sport cap with silicone bite valve and locking tab for secure, spill-free flow control. One-hand access on the go.
100% BPA & PVC FreeConstructed from 0.25mm TPU and HDPE. Safe for you, safe for the environment, built to perform.
Dishwasher SafeToss it in after every run. No brushes, no fuss. Clean gear ready for your next effort.
Freeze or Fill HotRated from freezing to 140F / 60C. Fill with ice for hot races or freeze overnight for slow-melt hydration on long efforts.
Ultra-Light at 1.4 oz500ml / 17oz capacity weighing just 40g. Carry more water, feel less pack.
Fits all Orange Mud hydration vests and most hydration packs. Ideal for running, trail, ultra endurance, hiking, and triathlon.
