2 liter bottle....put a hole in it about 3/4 down on the bottle stick a straw in the hole...make another hole on the other side for a carb....use tinfoil or somehting of that sort and stick it in the top..if using tin foil poke little hole not big enough for the bud through fall through..(use a toothpcik or some shit)....i know tinfoil is bad for you but when i was younger this is how we made them....tada your done