Tumblers & Water Glasses by Duralex. Details:Founded in 1939, Duralex has been manufacturing tempered glassware and tabletop products for over 80 years in La Chappelle-Saint-Mesmin in the very heart of France. Since 1939, when Duralex invented the glass tempering process, the name Duralex has been associated with toughened glassware, utilizing their proprietary process. The Unie glass is functional yet stylish and feels extremely comfortable in the hand. The tempered glasses are equally suitable for cold or hot drinks, conveniently stackable, microwave, freezer and dishwasher-safe, impact and chip resistant, and the perfect weight. With the help of continuous investments and commitment to quality, Duralex has reached a level of excellence that makes its products recognized throughout the world. Great for indoor, outdoor, and commercial use. Sleek lines and durability make this glass extremely fashionable and useful at the same time. Microwave and dishwasher safe.