please, DO NOT suggest any deisgns that involve smoking tin foil. there are many good alternatives, example, use a small socket, for a VERY small diameter nut(4 or 5mm, soemthing tiny), and use the square part to put pot in, and put a little screen in there too. This works VERY well, and is reasonable healthy.


OR use a carrot, jsut cut a bowl into the back(the big side), and poke a tiny hole through with a long striaght piece of coathanger(the bottom part of the triangle works well), cut the carrot so that it only extends a bit under teh threaded part on the end of the bottle