Polish Pottery Bell-shaped Mug 6.5 Oz. From Zaklady Ceramiczne Boleslawiec #913-104 Art Unikat Signature Pattern, Capacity: 6.5 Oz. Dimensions: Capacity: 6.5 oz. 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