Does anyone know if the TP roll fits completely inside a one pound coffee can, or whether it sticks up at all?

I had read about the TP heater on the NOAA website a while ago. I didn't have a one pound can handy but thought the idea was interesting so I tried a smaller scale version. Took a soup can, stuffed crumpled paper towels inside it, added the alcohol and fired it up.

I understand the science behind it, but it still amazes me that the paper towel doesn't really burn even though a flame is dancing over it. Pretty nifty. However, the entire can got extremely hot, including the bottom part. I don't see how I could have this sitting anywhere inside a snowbound car without melting something.

I didn't fill the can completely with paper towels, hence my question about a TP roll. I'm wondering...if the TP sticks slightly above the rim of the can, maybe that keeps the flame away from the can and it won't heat the metal up so much. Just a hunch.