These modern new seasoners are made of a Thermo Plastic Carvanite product. Used properly they will give perfect satisfaction. DO NOT, however, wash them in boiling water or subject them to an undue amount of heat. CARVANITE PRODUCTS Los Angeles CA Vintage Art Deco Carvanite 3 Pc Salt Pepper Shaker Set in Dusty Rose Box. This set includes a pepper shaker and salt shaker made of plastic, suitable for dry seasoning. The shakers are rectangular in shape and have an original Art Deco style. The set is perfect for all occasions and has a food theme. It was made in the United States and comes in its original box.