2 liter bottles in the frying pan
 

When you melt the tops of the 2 liter bottles in the frying pan, do you use some sort of non-stick substance so the plastic doesn't stick and burn, or can you jst do it with a low temp setting under the pan.

I use an old frying pan that still has some Teflon on it. 200 degrees is what I set the heat to. if you do it too fast then the bottle will not curl correctly.