• Foldable bottle specifically designed for hydration vests and running backpacks. • Wide shape with a 3D-welded base for a stable and comfortable fit in large-sized pockets. • Equipped with a SpeedFill cap that allows for quick and easy refills in a single motion. • Soft and flexible material that compresses as you drink to reduce water movement and facilitate storage. • Compatible with 42 mm threaded water filters. • Made from durable materials: TPU, PP, silicone, POM, and 304SS. • Includes SpeedFill cap and bite valve. • 500 ml capacity with a light weight of 42 g. • Does not include a running straw.