San Francisco Golden Gate Bridge Coffee Mug "San Francisco Golden Gate Bridge" Coffee Mug The mug is a dark color when cool, add a warm drink into it and watch as black coating vanishes to reveal the twilight picture of the Golden Gate Bridge with downtown San Francisco in the background. 11oz ceramic mug / Hand Wash Only / No Dishwasher or abrasives on outside to clean / Microwave Safe Images Imprinted in USA Hand wash and cup will change colors for years of enjoyment