An innovation in hydration technology that turns almost any bottle into a hydration system in 3 easy steps. The convertube is compatible with most standard bottles including the Nordic Kayaks water bottle.
 
The Convertube by Source gives you the ability to drink on the move without taking the bottle out of the pack. The kit contains four adaptors, a tube with the Helix bite valve and a Dirt Shield.
 
The Convertube™ adaptors
Sigg 
Nalgene (63mm) 
Evian 
Standard PET 
Liquitainers Source
Nordic Kayaks drink bottle
 
Specs
Tube length - 94 cm
Inner tube length (inserted into the bottle) - 35 cm