Deuter Streamer Tube and Helix Valve - The mouthpiece is leak-proof thanks to its additional water-stop lock. It opens simply by turning. Light pressure activates the drinking opening, which offers a pleasantly high liquid flow regardless of the position in the mouth. When set down, an integrated spring valve automatically closes the mouthpiece. The "Hi-Flow Bite Valve" can be easily dismantled for cleaning.
The attachable protective cap keeps dirt away from the mouthpiece during longer transport.