Need a seat for a guest but have no room to keep an extra chair? Consider the Factum Cube. It's not only functional and flexible -- it's recycled and recyclable.
The Factum Cube is made of recycled paper board, and then printed with various designs (options are shown here and include a London Tube map, a London street map, 60's psychedelic text, and the periodic table). It comes packaged in a suitcase-shaped box and then easily unfolds into a cube, which is designed to hold up to 220 pounds.
Available at Art Meets Matter for £24.95 (approximately $46).