- WingStay removable stabiliser prevents bounce
- Large 42mm opening for quick ice and drink mix loading
- Tapered shape for easy pocket loading
- High-flow, self-sealing bite valve
- Durable TPU- and RF-welded seams
Hydrate effortlessly with this 500ml flask, designed for compatibility with vestpacks. A WingStay™ removable stabiliser prevents bounce, while a wide-mouth opening makes it easy to load ice or mix in electrolytes. A high-flow valve, easy-grip twist cap and tapered shape simplify hydration. Crafted with durable TPU and RF-welded seams, and compatible with the UltraFlask Filter Cap (sold separately).