Ceramic Artystycna Violets Bubble Mug, 12 oz, Blue Microwave dishwasher freezer and oven safe up to 500 Degree; safe to use with food; lead and cadmium free; chip and crack resistant; easy to clean Made of out stoneware; painted by hand using sponges and brushes; covered with hard and lustrous glaze that is scratch resistant Made in Boleslawiec, Poland; region famous for its high quality ceramics; history of making pottery in the region dates back to 14th century Premium quality European stoneware certified to be Quality 1 selection Made by or for Ceramic Artystyczna in Boleslawiec