iv made a bong, its not very good and theres glue everywhere , i made the bowl out of a bottle cap, and it has a hole in middle which is connected to the pen/pipe i had to put some blue tac at bottle of the cap, because the pipe was on a tilt, so if i put some weed in, it wud'nt sit on the hole, it wud sit on the bottom and then wehn u lit it it wud'nt go through the hole and into the chamber, so thats why i out blue tac at bottom of the cap/bowl. ill post pics in the morning before my work exspirence.