Okay, this is a silly little (educational?) novelty-mug I just heard about: the Global Warming Vanishing Land Mug. "Each mug is covered with a map of the world. When you pour in a hot beverage, the mug shows what happens when the world heats up and the oceans begin to rise... Land mass disappears before your very eyes!" Although it appears to be showing a sea-level rise of fifty or a hundred feet, wiping out whole chunks of continent, so drink from it with a big grain of salt. Or a lump of sugar.