Thats a nice one.
I wanted to say something about home made bongs..
Years ago in high school my friends and I made about a 7 foot bong out of gatorage bottles. The first bottle (the base of the bong) was one of the shorter fatted gatorade bottles, to give it a firm base. One top of the short fat one were the regular size gatorade bottles. Putting it together was so simple: just cut the bottle of the bottle off, and put them together like lego, with duct tape on the seems to make it air tight. Well before we knew it this bong grew, and grew, and grew, and grew. It started as a normal bong that one person could smoke, but before its final smoke (and then destruction) it was a whopping 7 feet tall. It was shaped like an L, so that you could sit fully reclined, then bong sitting on the bong, and it would still reach you. Because the bong was so large it took at least two people to smoke it. Literally, it was so damned big you couldn't smoke it by yourself. It simply was not possible to suck on the mouth piece at the top of the bong and reach the bowl at the bottom to light it..man..those were the days. Even with two or three people, each person would hit it slowly first to fill it completely full of smoke, then you'd try and finish it, which was always damn near impossible. Damn those were the good ole' days..lol..