Set of 2 14-ounce Sun's Tea double wall glasses. Made of thick non-fragile laboratory grade borosilicate glass. Designed for your everyday use, stronger, more durable, has passed freefall ice ball impact test from 16 inches height Insulated to keep cold drinks cold and hot drinks hot, this handcrafted drinkware does not sweat Two clear layers create illusion that liquid is suspended within Dishwasher and microwave-safe. 6 month manufacture warranty. The Sun's Tea (TM) double wall glasses keep your hot or cold drinks longer due to their unique double-wall feature. Its two walls allow you to hold onto a piping extreme hot glass of hot drinks without burning your fingers, or prevent condensation from forming on the outer wall while holding a cold beverage. This double wall glasses is made of stronger borosilicate glass which is perfect for your everyday use. * Sun's Tea(TM) is the trade marker owned by SUN Valley Enterprises LLC