Polish Pottery Mug - 15 oz. Bubble - Unikat Signature U2663 4"H (15 oz measured near the rim) Handmade and hand-painted in Poland. Use for coffee, tea, hot chocolate, cider and more! This mug is a perfect gift for any occasion- birthdays, anniversaries, secret santas, get well soons, weddings, etc.! All of our Polish Pottery is safe for use in the microwave, dishwasher, and oven. Unikat Signature - signed by the artist - Teresa Liana