These components are encased in biocompatible soda lime or borosilicate glass and hermetically sealed. Arcopal tableware was famous for its translucent opal borosilicate glass. European Pyrex is still made from borosilicate. Caesium can be stored in vacuum-sealed borosilicate glass ampoules. Virtually all modern laboratory glassware is made of borosilicate glass. Borosilicate glass is transparent and can withstand thermal stress. Most premanufactured glass guitar slides are made of borosilicate glass. Cadmium compounds are utilized in coloring borosilicate glass used by artists in lampworking. Tanks can be plastic or borosilicate glass. The most common compositions are based on lead borates (leaded borate glass or borosilicate glass). Borosilicate glass is safe at oven temperatures. Most are made of porcelain or borosilicate glass. Examples of such glasses have commercial significance, e.g. soda-lime glass, borosilicate glass, lead glass. Aquarium heaters are sometimes made of borosilicate glass. Lighting manufacturers use borosilicate glass in their refractors.