Re: Double foil
when i wrap my bowl, i use two sheets of foil and with a ring in between them.
the way it works is with one piece of foil over the bowl with holes poked as usual but then i put a .5" tall ring of foil that i fold on top of the first layer that encircles the holes in order to create a large air cushion. then i put a second layer of foil on top of the first layer and the ring and poke holes in it also. it makes for a very good, long smoke and eliminates the possibility of charred tobacco.