Sun's Tea(TM) 16oz Wave Strong Double Wall Thermo Glass Tumblers for Beer/Cocktail/Lemonade/Iced, Set of 2 Set of two Sun's Tea 16-ounce double wall glasses. Made of lead-free high quality borosilicate glass. (not plastic) Unique wave design make it easy to hold. This high quality glass is perfect to use in the home or office Designed for your everyday use, sturdy and durable, passed freefall ice ball impact test from 12 inches height. Dishwasher and microwave-safe. Hand washable with easy using Sun's Tea Push&Pull brush. 6 month limited manufacture warranty Air insulated in the unique double wall structure keeps cold drinks cold and hot drinks hot, the outside surface always feels comfortable in hand.