BTW,

1- i read that he uses the mat side of the aluminum foil to avoid it from burning and catching fire, the shiny side can catch fire and will release chemicals, but thats common sense, why would anyone place plastic, aluminum, anything directly on fire and then complain that its hazardous.

2- the bottle already prevents any heat from the aluminum from reaching into your lungs, much more then some of the smaller vaporizers, you can also add a tube by placing it into a hole on the cap of the bottle, this way none of the vapor is even warm,

most important part he says is that you warm up and toke as you go, there is no such thing as how long you let it sit on the surface etc, you simply empty the vapor from the bottle once its full by sucking it out, you have to hold the bottle and the pan or pot so that it does not tilt and let the vapor out is all anyone worries about from what i heard.