Steamroller pipes by Ragabong are made from all-natural bamboo with a metal bowl fastened to one end. The word "bong" originates from the sound a bamboo pole makes when it hits the ground. It is an old tradition to smoke out of bamboo. Ragabong is the only "bong maker that does it right. Their products are coated inside and out with a non-toxic resin that makes them waterproof and incredibly easy to clean. Every single is different. If you want something original, the Ragabong bamboo steamroller is the only way to go.