Clever Design - Eco-Conscious T-issue Box (2 pics)

Sometimes the simplest designs send the strongest messages. South Korean designer Lukas Koh took an ordinary tissue box and transformed it into an environmentally aware object, called T-issue. The tree shaped cut-out on the side allows you to see how much tissue you have remaining, as well as making you conscious about your consumption habits.

Lukas Koh's website
via designboom, colectiva