To make a pen-less stem and bowl, just take aluinum foil, make a hollow tube, and then flange it a bit at the top to make a bowl- if you make the hole small enough, you don't need a screen. I have never used screens in my bowls, bongs, pipes, ect, and I've never had any issue with weed falling through the holes, so it's personal discretion.
Purple Banana Reviewed by Purple Banana on . Aluminum bad? I was about to make a bong with a water bottle, pen piece, and an aluminum cone i made out of a can. But than I remember my friend telling me that smoking off aluminum could get me Alzheimer's. Is this true? Rating: 5