But then why not drill a hole in a glass bottle, put your buds/whatever in the bottom and hold your lighter under it till vapours fill the bottle?
take your finger off the hole and inhale. Voila, a vaporiser.

Yeh a mate tried that, but with a blow torch, and the bottle didn't break, it like exploded and shattered glass absolutely everywhere.
I eventually bought a cheapo manual one, the basil bush one, after realising we don't smoke inside that often, and so an electric one would be a waste at the moment. Only tried it once so far, and think we heated it a bit too much. It felt like holding your mouth over a kettle and breathing in, and left us with steamy scolded throats coughing for some time haha. We used skins for the rest of the night after that and haven't used it since. Will have to try it again sometime, though it was only a fiver from manchester and so isn't too much money wasted if we don't.