Milky Way Tree of Life Soap Mold Tray - Melt and Pour - Cold Process - Clear PVC - Not Silicone - MW 148 Brand: Milky Way Material: Clear PVC (NOT SILICONE) Care: Wash in warm, sudsy water. Please avoid the dishwasher because that can warp your molds or make them brittle. Maximum Product Pour Temp: 145F. If you pour at a hotter temperature, your mold will likely warp. Not Approved for Food Contact