Enjoy your favorite drink like never before with the joyjolt serene double wall glass cups! These 13.5 capacity double wall glasses are perfectly suited for a multitude of hot and cold beverages as well as desserts. Individually handmade of heat-resistant borosilicate glasses, they are designed to keep your liquid hot or cold for a longer period of time, while keeping your hands cool to the touch. Borosilicate glass is a heat-resistant glass that is perfectly suited for hot and cold drinks. While borosilicate glass is naturally lighter than traditional glass, it is stronger and more resistant to temperature changes and scratching. They are also dishwasher, microwave and freezer safe. Double wall glass allows your hot beverage to remain hot for a longer period of time while keeping the outer glass cool to the touch. Your cold beverages will remain cool inside while the outer wall remains free of condensation. The optical illusion of your suspended beverage can also provide a new look to your favorite drink! Set of 4 Shatter resistant Easy to clean Dishwasher, microwave, oven, and freezer safe (up to 350°f) Made from borosilicate glass Comes ready in a beautiful gift box Backed by a limited 1 year manufactured warranty  # Pieces In Set: 4 Features: Freezer Safe, Handmade, Oven Safe, Transparent, Microwave Safe, Dishwasher Safe, Insulated, Double Wall Construction Capacity: 7.4 oz. Maximum Temp (f): 450 Degrees F Mug/Teacup Measurements: 3.5 Depth/Inches, 3.75 Height/Inches, 3.5 Width/Inches Base Material: 100% Glass Care: Dishwasher Safe Decor Styles: Modern Material: Glass Country of Origin: Imported