Multiple realities(covers information from several alternate timelines)
Malkothian spirits were a type of spirit produced by the Malkoth, which ceased to exist when the Malkoth race was erased from history by the Krenim weapon ship, save for one bottle kept by Annorax.
In an alternate 2374, Annorax served the bottle at a dinner for Chakotay and Tom Paris, along with other dishes from civilizations that never existed. (VOY: "Year of Hell, Part II")
The spirit appeared fairly red in the bottle, but almost transparent in the glass.