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.