Dont use soda cans they will fuck your lungs up man.That aluminum is the worst metal to use when smoking.Make a simple bong,using a sprite or other plastic bottle.Then take a ordinary bic pen and pull the ink part out so that you have a hollow tube left.then you spark a ciggarette and use the cherry to make a hole above water level.Then you just stick your pen in,fill with water and wa la instant BONGIFICATION.Happy toking.