<p>Williams Sonoma customer favorite since Chuck Williams first introduced it more than 40 years ago. The tumblers are made in France of durable tempered glass and are suitable for everything from hot coffee and café au lait to breakfast juices and iced drinks.</p> <ul> <li>Shatter-resistant and chip-resistant.</li> <li>Duralex tempered glass is 2 1/2 times stronger than ordinary glass.</li> <li>Manufactured to withstand sudden temperature extremes from -4°F to 212°F and suitable for hot or cold liquids.</li> <li>Glasses are stackable for convenient storage.</li> <li>Adaptable modern glassware can go directly from the freezer to the microwave.</li> <li>Made in France.</li><li>Commercial Grade: Thoughtfully designed and expertly engineered to meet rigorous standards and best practices from select commercial testing.</li> </ul>