Duralex has been manufacturing tempered glassware, through a process they invented, in the heart of France since 1945. Ideal for both hot and cold drinks, these stackable, impact- and chip-resistant glasses feel very comfortable in your hand and can be used in the microwave or freezer. Set of six glasses in six colors: crimson, mint, yellow, lavender, gray and cobalt. Dishwasher-safe but for a longer product life, it is recommended that you use a delicate cycle or hand wash (do not use abrasive sponges or cleaners).