HydraPak UltraFlask Speed 500ml - Collapsible Soft Flask Water Bottle for Hydration Vests and Running Packs with Easy Open Cap (500ml / 17oz)

The perfect balance of sleek and stable, our signature UltraFlask has a wider form and a durable 3D welded bottom. Soft and pliable material means you can fit it in most pack and larger vest pockets f...