While sitting here tokin', I thought I might post some pics of some of the pipes I made recently. Now personally, I have a hookah that I smoke my herb out of primarily, but I thought I'd give a shot at a homemade pipe. I did two. One is a pretty small one hitter, and the other is a highlighter pipe with an okay sized bowl. The one with the smaller bowl is made with the body of an old sharpie. And the other is an accent highlighter. I got the screen for this one from an old pair of headphones. Works like a charm. Sorry for the kinda crappy photos, webcam is being stubborn.
To be honest, I wouldn't recommend smoking out of those more than once or twice. You're drawing all that hot smoke right past a bunch of plastic, which I'm sure isn't too swell for your lung health/capacity. Try getting a Zerbra mechanical pencil, they're all metal and the cone-shaped tips are great for packing one-hitters.