We used the glass pop bottles, throw a little stone in, swish around and flick to make a hole, insert knives, no plastic. Been a while, and all this talk about hot knives has me looking for empty bottles, have a stash of old camping cutlery available. Next time I see a hot plate on sale at Canadian Tire will go back 40 years or so and do a few hits for old times sake. I remember a few slips like some of the one's mentioned, recipe for burns, stoner with red hot knives, hmmm... maybe we're not as smart as we think we are
