What's the difference between a Hippo and a Zippo?
One is gigantic, the other is just a little lighter.
Listen here, buttercup. This is a play on words. A hippo is a big animal, and a Zippo is a lighter. "Lighter" refers to the weight of the two items but also the function of the Zippo brand lighter. I bet you didn't know that Zippo lighters are made in Bradford, Pennsylvania. Sad!