Carbonite
a strong metal alloy used to preserve tibanna gas and other valuable materials, carbonite was a densly-interlaced matrix of carbon and tibanna atoms. Experimentation - mainly by disgruntled crimelords - revealed that carbonite could also preserve a living body, maintaining it a state of hibernation until the carbonite could be removed. The encased being often experienced hibernation sickness when extracted, although a being left for too long usually died from malnutrition. Note that Zorba The Hutt's Revenge indicates that carbonite was made from Tibanna gas at Bespin, although Dark Lords of the Sith indicates that carbonite was the chief export of the Empress Teta System. Zorba the Hutt's Revenge also lists carbonite as a source of fuel.