Stimufrost was a type of blue-colored substance that could be consumed by sentient beings. During the Galactic Civil War, the influential Imperial Lady Thalassa Tarkin ordered stimufrost to be administered to all of the guests attending the Thirteenth Imperial Diplomatic Conclave, a gathering of high-ranking dignitaries on the planet Phelarion. Leia Organa, a Rebel Alliance leader who was posing as a servant girl, administered some stimufrost to the ace pilot Shea Hublin on full-strength, but she sprayed too much of the substance at him and almost froze his face.