The hydration system allows a continuous supply of fluids without interrupting exercise. Taste-FreeTM: The inner surface of the bubble and tube is as smooth as glass. These molecular material properties make the Streamer tasteless, very hygienic and easy to clean. Grunge-GuardTM: This coating, firmly bonded to the carrier material, prevents bacteria from colonising the drinking system. Easy Clean: The bubbles can be conveniently filled and cleaned through the large opening across the entire width - absolutely leak-proof thanks to the slide-clip closure. Dirt Guard: The clip-on protective cap keeps dirt away from the mouthpiece during prolonged transport. Deuter backpacks are specially designed for the Deuter bubble system