Duralex is a French tempered glass tableware and kitchenware manufacturer located in La Chapelle-Saint-Mesmin in Loiret. Using a technique developed in the 1930s by Saint-Gobain, molded glass is heated to 600 degrees Celsius, then cooled very quickly, giving it an impact resistance twice superior to normal glass.The "Picardie" tumbler and the "Gigogne" glass are two of the company's best-known products.