If you had a need to boil water and only had a candle and a glass, what would you do? If you were photographer Georg Pillwein you would be creative and boil the water from inside the glass.
Fire and Water
Having the flame directly in the water has to be a very efficient way to transfer energy to the water. I only wonder why other folks didn't think of this earlier.
If you wish to use this photograph or any other that Georg has on his site drop him a line.