Bates and Worm Diffusion Pump Vapor TubeComing from the mad scientist laboratory of Steve Bates and Worm is the original diffusion pump vapor tube, one of the most innovative designs in the glass industry. Make sure the water level is up to the top of the can on this one before hitting as the functions depend on it. The vapor pulls down through the curved tube towards the base where it is met with short bursts of air from the vibrating bead located in the lower back tubing. The result is a