The glass cookware produced by Far East glassware Co., ltd. is made of borosilicate glass(a material with a high thermal shock resistance feature) It is created by adding boron to the traditionl glassmake's "frit"of silicate sand, ground lime, and soda by pressing melted glass further strengthened by a higher tempering process with new techniques. They are used in electrical household appliances and cookware markets both at home and abroad.