The bottom interior of the Black Boston Coffee Mug showcases the nickname “Beantown” and includes an additional boston graphic. Americaware souvenir mugs are the highest quality stoneware mugs available. They are microwave and dishwasher safe. This generously sized 18oz two tone ceramic stein style mug, features a beautiful black matte exterior and contrasting tan interior inspired by the “black and tans” served in old time Irish pubs. The raised emblem features popular Boston icons.