Made a triple chamber bong out of plastic baseball cases, clear airline from fish tank, and old plastic lightsaber tube in the long ago… it still lit up! A gallon glass peanut butter jar with a slide bowl and air hose , down tube had an old coffee diffuser from a perc coffee brewer. More bubbles = more surface area. Stainless steel bong, 4’ long called two face . Had one face going in and another after. Upside down bong from small candy globe with cork sealed screw on cover. Built a stand for it with dowels cuz tubes came out the bottom. Harvested large bamboo in Florida and made a two chamber bong out of it… I’ll see if I can recall more. There were way more! Made bowls out of silver dimes using a flare tool and soldering it to tube with silver solder.