Tube Adapter for hands-free drinking from Source Nomadic and Jet collapsible bottles. The Tube Adapter is easy to connect and the 14cm long tube allows you to drink from bottles stored in running vests without having to take them out. Perfect compatibility ensures easy assembly and disassembly. The adapter includes the popular high-flow Helix Bite Valve and Dirt Shield. It is made of PVC and BPA free material.