Next time you wrap your hands around a comforting cup of cocoa and drift off into a reverie contemplating such charming thoughts as global warming and whether you live on a hill or not, you can see at a glance whether you need to consider buying a boat anytime soon.

Just unwrap your hands and take a look at that nice mug with a map of the world on it. Things have changed. When you add hot water to the mug you will see the world's coastlines slowly disappear under a hundred metres of water to reveal our much denuded landmass.

It's a sort of fun disaster mug, if that isn't oxymoronic, and you can even put it in a microwave (oh the irony). Global warming may not be a laughing matter, but there's nothing wrong with smiling in the face of adversity.

Features

• A mug that reveals how the world will look after the polar ice caps melt.
• The map on the mug responds when the mug is filled with hot coffee or another hot beverage.
• The mug is microwave safe.
• Do not put in the dishwasher or soak for long periods of time.
• Suitable for ages 12 years+.
• Size: 13 x 9 x 8cm.