Crafted from enduring quality and beautifully functional in design, these glasses are crafted from tempered glass, making them shock- and chip-resistant and suitable for hot and cold beverages alike. They also stack for easy storage. Made in France. After inventing the glass tempering process in 1939, Duralex has spent the years since making stylish, functional, and durable tempered glassware and tabletop pieces in La Chapelle-Saint-Mesmin, right in the heart of France. Much like its processes, the quality of its glassware has remained unchanged over the years, and these traditions have helped Duralex become a familiar name in households around the world.