Polish Pottery Potbelly Coffee Mug 16 Oz. From Zaklady Ceramiczne Boleslawiec #910-du60 Unikat Pattern, Capacity: 16 Oz. Dimensions: Capacity: 16 oz. Height: 3.7" Boleslawiec white clay molded and painted by hand Polish Pottery is oven- dishwasher- stove- and microwave oven safe, lead and cadmium free, resistant to chip Manufacturer: Zaklady Ceramiczne "Boleslawiec" Pre-baking at 1562 degrees Fahrenheit, Glazed and fired at 2280 degrees Fahrenheit