In his original form, Tom was almost entirely painted in silver, with only his clear dome and a band of red around his midsection. He would later settle into his more common red-and-white paint scheme, although he has been known to change things on occasion, such as when he had his dome trimmed to a cylinder for a time. The empty space inside Servo's head often allows his shipmates to fill it with assorted items, such as the colorful candies, coffee, or ping pong balls. 