This set of vintage Federal Glass coffee cups features the iconic "Slave & Master" design in a striking yellow and red color scheme. Each cup measures 3 inches in width and showcases the Mirror Master character, making them a unique addition to any collection. The brand's quality craftsmanship is evident in the intricate details of the design, making these cups a must-have for any coffee mug enthusiast. Whether used for your morning caffeine fix or displayed as part of a collection, these Federal Glass coffee cups are sure to impress.