Pipe, sometimes called piece or bowl in terms of cannabis consumption, refers to an instrument used to smoke the plant. They are made from a variety of materials, including blown glass, metal fittings, ceramic, Borosilicate glass, stone, wood, bamboo and other materials (preferably not aluminum). Subtypes include one-hitters, bubblers, chillums, glass blunts, corn cob pipes, and standard hand pipes. Pipes vary greatly in shape and materials, and the common thread between them is having a narrow screened receptacle, a "stem" (which may be a long flexible tube as on hookahs and vaporizers), and a "mouthpiece". The smoking material is placed in the receptacle and affected with a heat source while air is drawn through the bowl and stem to the user.
- Benefits of Headshops to Economy (July, 2011), Marijuanaconnections.com