Hydrate Without Hesitation.
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 Design — Collapses as you drink to reduce sloshing and maintain stability in motion. No distracting noise, no shifting weight.
- Locking Bite Valve — 42mm sport cap with silicone bite valve and locking tab for secure, spill-free flow control. One-hand access on the go.
- 100% BPA & PVC Free — Constructed from 0.25mm TPU and HDPE. Safe for you, safe for the environment, built to perform.
- Dishwasher Safe — Toss it in after every run. No brushes, no fuss. Clean gear ready for your next effort.
- Freeze or Fill Hot — Rated from freezing to 140°F / 60°C. Fill with ice for hot races or freeze overnight for slow-melt hydration on long efforts.
- Ultra-Light at 1.4 oz — 500ml / 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.