This mug is the most fun you’ll have with your morning coffee. Black when cool, then transforms when hot to reveal a white background, Scottish flag, and Slàinte! caption. Bear this mug to show off your Scottish roots and know exactly when your favorite drink starts to lose its heat! Microwave and dishwasher safe, this mug is plenty durable and holds about 10 ounces. Whether adding to your collection of Celtic paraphernalia or gifting to a Celtic friend, this awesome mug makes a delicious drink even tastier. Slàinte!