Made in France since 1939; Impact and chip resistant, extremely durable Duralex tempered glass is 2;5 times stronger than ordinary glass Shock resistant manufactured to withstand sudden temperature extremes from -4 Degree to 266 Degree and is suitable for hot or cold liquids Freezer, microwave and dishwasher safe; Adaptable modern glassware can go directly from the freezer to the microwave Stackable; Duralex glasses and bowls are stackable for convenient and space saving storage; Hygienic nonporous Duralex glass does not absorb liquid TOP QUALITY Constant quality control guarantees excellence and built in durability insures that Duralex products will maintain their look for many years; Lead free, cadmium free, and BPA free