About This Double-Walled Mug Design: Glass coffee cups are double-walled and have an excellent thermal insulation effect, which helps keep drinks cold or hot longer. Hand Crafted: Hand-blown borosilicate glass is lighter than ordinary glass yet highly durable and stable. 100% lead-free, BPA-free. Suitable For Daily Use: Glass coffee mug set holds 13 oz, with large capacity which is perfect for serving hot coffee, iced tea, lattes, cappuccinos, and other beverages. Easy to Clean: The wide opening makes cleaning easy. Microwave, and oven-safe. Borosilicate glass cups withstand temperatures from -30℃ to 150℃ and are more durable than ordinary glass mugs. Elegance Wrapped And Ideal Gift:The double layer glass mugs wrapped in an elegant and stylish gift box are the ideal gift for your family or friends. Especially for a birthday,a housewarming,a wedding or an anniversaries Overview Brand : Aurzen Material : Borosilicate Glass Color : Transparent Capacity : 13 ounces Special Feature : Double Wall