Unique Ergonomics Design This simple double walled glasses are with special roll up rim design, perfect to match your lip and your tone to taste the flavor of coffee better. Different with most of the double walled glass coffee mugs in the market, the handle is also specially designed to let various size of hands hold this clear coffee mug comfortably. 100% Borosilicate Glass This glass coffee cups are 100% borosilicate glass, heat-resisted from -86℉ to 752℉, borosilicate glass mug is light but stronger than normal glass, you can use it to drink either hot coffee and tea, and iced tea or cold brew coffee, safe in Microwave Oven, Freezer and Dishwasher. Double Wall Insulated Design Comfome clear coffee cups are two layers insulated. This clear insulated coffee mugs can provide cold or hot drinks. Won't burn or freeze your hands and keep your drink ever longer. Multipurpose for your choice】 You can use this clear glass mug as glass tea mug, coffee glass mug, espresso cups, Latte mugs, Cappuccino cup, juice cup, or milk, and plant or herbal beverages mug. clear mug for coffee Ideal Gift And Great Service This double wall glass tumbler comes with a beautiful and safe package, suitable as a gift for your family or friends on special occasions such as weddings, parties, birthdays, housewarming and anniversary. If Any of the coffee mug glass is damaged in any way upon arrival, we will send you a replacement set free of charge. Your satisfaction is our priority.