Strong | Double-Wall Insulated Tumbler Set by Sun&rsquo;s Tea (Tm) | 9oz | Double Rocks Glass Old Fashioned Whiskey Glasses &ndash; (set of 2) Borocilicate Drinking Glasses PREMIUM DRINKING GLASSES: Crafted from borosilicate double wall glass, these 9oz insulated glasses offer the perfect balance of traditional handmade craftsmanship and modern design VERSATILE: Suitable for hot drinks or ice cold beverages, these thermal double walled tumblers are perfect for serving and drinking juice, tea, coffee, sodas, beer, whisky, bourbon on the rocks, and make a unique addition to your barware glasses CONDENSATION FREE  Glasses keep your hands safe and surfaces dry, eliminating the need for drink coasters by reducing moisture buildup and preventing your beverages from sweating (becoming watered down) EXCEPTIONAL QUALITY/ EASY TO CLEAN: These thermo insulated cups were built for everyday use and durability (passing the free-fall ice ball impact testing process from 16 inches)  while producing an ergonomic glassware drinking set that is scratch resistant, microwavable and dishwasher safe 100% QUALITY ASSURANCE  Satisfaction and craftsmanship guaranteed with our exclusive line of old fashioned double rocks glasses which include a (6) month warranty