Every year, the members of Spacesim design a unique mission patch to commemorate the completion of the mission, much like NASA does. These mission badges are usually sewn onto the flight suits of the astronauts who accomplished the mission. There has been a tradition of keeping a copy of the year's mission badge in a glass case in the office, although this case is missing several patches.
Patch vs. Badge
Officially it is referred to as a Mission Patch, but was known briefly as a Mission Badge or simply Badge in 2005-06.