STONEWARE Ceramic slump mold for melting 12oz domestic beer bottles. Hand made by Daniel Gutzwiller. This mold is designed for 12oz Bud, Miller, Coors, and Michelob bottles. These molds are not behemoths. They are as small as possible to maximize the use of kiln space. When used on stainless steel kiln shelves, 15 bottles can be slumped in just 4.2 cubic feet, for only a few dollars worth of electricity (Rates vary with location). This product is intended for industrial use only by experienced kiln forming professionals.