The UltraFlask Speed 500ml by HydraPak is the sleek and stable hydration solution for your fast-moving adventures.

Built with ultra-durable TPU material and RF-welded seams, this flask offers superior durability while remaining soft and pliable enough to conform to most hydration packs and vest pockets. The SpeedFill Cap features a 42mm opening for quick refills with ice and drink mixes, while the auto-sealing bite valve prevents annoying drips during your dynamic activities. As you hydrate, the flexible design shrinks to reduce water movement and maintain stability on the go. The large opening is compatible with 42mm threaded backcountry water filters and features a wide working temperature range from frozen to 60°C.

Take your hydration to new heights with the HydraPak UltraFlask Speed 500ml.

• SpeedFill Cap with 42mm opening for quick refills and leakproof transport
• Ultra-durable TPU construction with RF welded seams for superior durability
• Auto-sealing bite valve prevents drips between sips
• Flexible design shrinks as you drink to reduce water movement
• Compatible with 42mm threaded backcountry water filters