Polish Pottery 11 Ounce Handmade Bubble Mug From Boleslawiec Poland Traditional Pattern Blue Star Flower GENUINE: Each piece of Polish Pottery is certified as original and of First Quality FUNCTIONAL: Microwave, oven (to 450 F) and dishwasher safe EASE OF USE: Non-stick surface, cleans up in a breeze (No staining) SAFE: Lead and cadmium free UNIQUE: Each piece is hand painted and imported from Boleslawiec, Poland. Please allow for artistic differences