Leela:  Um , do we really want those cute giraffes in the cargo hold next to what looks like a leaky hand - made Berillium Doomsday device ?
Professor: Oh , my , no , no - it 's the much cheaper Einsteinium _ one nineteen _ .
Leela: What about the giraffe ?
Professor: Oh , do n't worry , if they get too close to the Doomsday device , just use this spray bottle to give them a gentle correction . It 's filled with acid .