I was concerned about that. I just figured I could cool down the lip of the mug with a cool wet cloth. Or, maybe I could come up with some sort of plastic device that I could slip on the lip of the mug.

One thing good about the enamel mugs is their easy clean coating. I plan on using Esbit this time around and I am told it blackens the bottom of pots. I think it might be easy to clean the black off an enamel coating.

Howie