WWF Paper Towel Dispenser

The World Wildlife Foundation altered a regular paper towel dispenser to show how paper use depletes rain forests in South America.

As written at Inhabitat:

These paper towel dispensers have a cut out the shape of South America through which a stack of green paper towels illustrates the green rain forest canopy of the continent. As the paper towel dispenser is slowly drained of its green paper towels, we see the greenness slowly drained out of South America, symbolizing the nasty environmental impact of disposable paper towels.