Buckets are the resource for troll reproduction. Imperial Drones carry them to hives, and force Matesprits and Kismesisses to put their genetic material into the buckets, which is then taken to the Mother Grub so she can produce wigglers. These are then raised by Lusi into adulthood. Trolls are very sensitive about this topic, and try to avoid using the words "bucket" or "pail". Vriska tells John that they are sensitive about cleaning products in general, which causes some misunderstandings.