[PDGearhead]

I can boil 2 cups of water in 4 1/2 minutes on about one half ounce of alcohol. A wind screen is a must, though.

[Kartographer]

My understanding it depends on the altitude and the outside temp the water boils but is not 212 degrees.

[patton]

I was teaching the kids to make a beer can stove, and the dang thing got so hot it busted the Pyrex!