A few tips from my kitchen to yours: Use glass or ceramic made dishes for baking foods made with eggs or with acidic foods such as tomatoes or lemons. Baking pans made of aluminum, iron or tin can react with these foods, causing discoloration in your finished product. Use metal baking pans when you want to brown your food, don't use glass dishes for this under a broiler because it can cause the glass to shatter. Also, I don't have a double boiler for cooking or melting. Instead I take my stockpot, boil my water, add a heavy gauge stainless steel mixing bowl inside. This works perfect if you are melting chocolate or making custards. Enjoy & Blessings.