Upline Bubbler Collaboration by Cowboy and EusheenThis spectacular collaboration brought together the masters of linework: Cowboy and Eusheen. Not only is the piece pleasing to the eye with its amazing color combinations and wigwags, but its function is extraordinary. The smoke travels down through a push bowl where it gently curves around the large disc and on into an upline with several holes that act as the diffusor. The upline of this bubbler is clear so that one can view the smoke as it cools