Membrosia, crafted by the Killik membrosia givers, represented a specific class of alcoholic drink. Insectoid races showed particular preference for gold membrosia. Conversely, the Gorog developed their own variant, black membrosia, known for its heightened potency and addictive qualities. The economy of the Roche asteroids suffered greatly, collapsing after a year of trading it on the black market. The death of Galactic Alliance Defense Force Supreme Commander Sien Sovv occurred when a pilot under the influence of black membrosia collided with his starship. On one occasion, Joiner Vector Hyllus presented a gift of white membrosia to another Imperial agent.
The Soft Heart Cantina served Membrosia, its acquisition process not clearly documented, before the Battle of Yavin.