Found this in a $2 box at an auction. Mystery container. Shaped like a hat box, silver colored metal with brass trimming. Inside is a porcelain ointment pot (I believe). Bottom is serrated. I think it's to fill with water and put on the wood stove or heater to act as a double boiler to keep a salve or lotion warm. 2" high by 3" across by 2.5" deep. Why a hat box shape? Let me know what you think.