Deuter Streamer Flask II 500 ml Hydrablue. Making it ideal for vest pockets and hip bags as well as running belts. Made from soft silicone it shrinks as you drink to prevent its contents from sloshing and bouncing about. The valve is instantly self-sealing to prevent spillages. And with a standard 42 mm opening it's easy to fill. Specifications for Deuter Streamer Flask II 500 ml: Manufacturer: Deuter Reservoir Volume: 500 ml Color: Hydrablue Package Contents: Deuter Streamer Flask II 500 ml Deuter 396222530870: Streamer Flask II 500 ml Hydrablue