Some stoner-engineering could hook up two cans with each other, one is the cup you use for burning the material and the other one the "water-passageway". Obviou

Some stoner-engineering could hook up two cans with each other, one is the cup you use for burning the material and the other one the "water-passageway". Obviously not recommended as there is plastic liner on the inside, but in that way you could use the inside :) Basically a bong in two pieces made out of two cans.