These mugs are made with high quality borosilicate glass, which is microwave and dishwasher safe, making them perfect for everyday use. The double wall construction keeps your coffee hot for longer, while also preventing the mug from becoming too hot to handle. With a sleek and modern design, these mugs are a stylish addition to any kitchen or coffee bar. Whether you're sipping on a morning espresso or enjoying an afternoon latte, these 12 oz Double Wall Glass Coffee Mugs are the perfect vessel for your favorite coffee drinks.