Tin foil is just fine... it's really easy. The whole idea is to make a channel that the meth will run down when it melts so that it doesn't get too hot. So you keep the foil tilted a bit to help with that and just kinda chase the smoke with a straw or something -- except straws tend to melt.It's a lot easier than it sounds. When you get to the end of the foil, flip it around and repeat. Supposedly called "running the highway" and "chasing the white dragon" or some shit, but I've never met anybody who actually calls it either of those.