Dark Matter

Dark Matter is a black fantasy fuel obtained from Dark Matter Deposits

It is a fuel. It is only stackable by 16. It is the longest lasting fuel, lasting 2.5x more than a lava bucket.

Dark Matter is from Matt Groening's science fiction television series; Futurama.it is used as a starship fuel in which Nibblonians excrete. It is the densest, and therefore heaviest, substance in the universe, with each ball that Nibbler produces weighing as much as 1000 suns. According to Professor Farnsworth, dark matter is so dense that "each pound of it weighs over ten thousand pounds."