This has got to be my favorite....

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!

The Global Warming Mug comes printed with a map of the world. When you add hot water, watch and see the contours of the landmass change as sea-levels rise.

Create your very own The World As We Know It Is Ending matched set with these and the Disappearing Civil Liberties mug. When hot liquid is poured into the cup, the landmasses shown on the map disappear. Consider this a guide to where you should buy your next house...

As you fill it up with hot water, the mug simulates disappearing land mass from the continents. Maybe it will remind your coworkers to stop using so many disposable cups?

I WANT THIS JUST TO SEE HOW IT EDUCATES ME

I NEED ALL OF THE EXCITEMENT I CAN GET

THIS WILL ADD TO MY VAST KNOWLEDGE OF ANYTHING AND EVERYTHING

The Global Warming Mug shows the adverse effects of global warming in the palm of your hand. Your mug is covered with a map of the world and pouring in a hot drink causes the land to disappear as ice caps melt and the ocean starts to rise, right before your very eyes.

A reminder of what we are doing to our planet.

"Your nice blue mug comes adorned with a map of the world, but add your hot drink and suddenly ice caps melt, water levels rise and land mass and coastlines disappear in front of your eyes. Watch as most of the UK is engulfed by the sea, Florida vanishes altogether and several worryingly gargantuan gaps appear in South America." Darkly comical and educational all at the same time. (via gizoo.co.uk)