Convertube Kit comes with four adaptors, a tube with Helix Bite Valve and Dirt Shield 24mm, 63mm and 42mm Adaptors fit Sigg, Nalgene, Evian and standard Pet bottles and Source Liquitainer 1 Liter and 2 Liter Easy conversion in 3 steps Converts standard bottles into Hydration Systems No need to remove bottle from backpack in order to drink Care instructions: hand wash only