Stoplight Coffee Mugs
The world's first traffic light was installed in London, England in 1868. It was lit by gas, manually operated, and exploded less than a month after it was installed, injuring the policeman who operated it. Today, stoplights follow a universal color code, which means a stoplight is a stoplight no matter where you are in the world. So, with our stoplight coffee mugs, red always means stop and green always means go.