Sun's Tea (TM) 14oz Strong Double Wall Thermo Pilsner Beer/cocktail/Iced Tea Glasses/champagne flutes, Set of 2 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.