"You know how they put the bubbles in this stuff?" Vinyaya's mouth twitched with the ghost of a smile. "I thought it was naturally carbonated." "Yeah, that's what I thought until I got a prison job at the Derrier plant. They employ every dwarf in the Deeps. They made us sign confidentiality contracts." Vinyaya was hooked. "So go on, tell me. How do they get the bubbles in?" Mulch tapped his nose. "Can't say. Breach of contract. All I can say is it involves a huge vat of water and several dwarfs using our . . . eh"--Mulch pointed to his rear end--". . . natural talents." Vinyaya gingerly replaced her bottle."