i made 1 outta a normal water bottle,took a black bic pen and chopped the end of both sides and got the PEN part out so there was just a shell,found some metal piece and put it on top of the pen and wrapped a lil' tin-foil around it,put a carb in and i was set to go,it hits pretty fuckin good

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weed:20 dollars
paper:5 dollars
the look on your face when your completely messed up: priceless