The sleeper pod was one of the earliest known spaceships capable of interstellar flight. Constructed on Alderaan even before the establishment of the Old Republic, ships of this type were equipped with basic chemical drives, were probably only capable of sublight speeds, and had equipment to maintain their passengers in cryogenic hibernation.
At least one sleeper pod survived until the time of the New Republic: one of several ships and vehicles placed by Palpatine within the Mount Tantiss storehouse, it was placed within a display hangar deep inside the mountain, one of the few areas to survive the destruction of the base in 9 ABY, and it was recovered intact by the New Republic xenoarchaeology team led by Garv Debble.