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Use a sauce pan or pot and fill halfway with water. Place a heat safe bowl right on top of the sauce pan or pot and use as you would a double boiler.
Source: KCTS Channel 9 Test Kitchen
By Carly from Lynnwood, WA
Instead of buying a double boiler for twenty dollars or more, I used a skillet that I found at Goodwill for the part that holds my candle wax or soap pieces. The skillet cost me two dollars. I use an old pot from Goodwill, another two dollars, for the base.
Fill the base a little more than halfway with water and set to boil. Place the skillet on top of the pot and place your wax or soap pieces in the skillet.
By McCollonough from TN