Duralex has been a specialist in the design and production of tempered glass tableware since 1945. More than ever, it is synonymous with toughness, design, and everyday practicality. The Provence glass is one of their best-known glasses, recognized by its unique shape and curves. They are seen in hotels, bars, restaurants, and homes all over the world. Fits perfectly in your hand and is suitable for any drink. These glasses are extremely strong and are tempered by heating them to 700 degrees. Stackable so easy to store. If the glass does break them it is designed to break into blunt fragments, much like a car windscreen. Suitable for children's drinks, wine, juice, and much more! Dishwasher and microwave safe, shock and chip resistant.