1. The glass mug is made of heat-resistant glass, which is not easy to break under rapid temperature changes, high temperature resistance, corrosion resistance, high strength and other excellent properties. The glass raw materials have been tested by professional testing institutions, and the content of lead, mercury, cadmium and other contents meets the limits of the EU RoHS directive. 2. 19oz coffee mug is lsuitable for coffee, tea, milk,espresso, latte, cappuccino, beer, juice, hot water, iced beverages,homemade drinks and other hot drinks and cold dinks 3. This simple design, clear and transparent glass coffee cup will fully display your various hot and cold drinks, and bring people a pleasant life feeling.