This may seem like a weird conversation starter, but the folks over at eco-chic-design.com have the reasoning behind it.
"The Conversation Table designed by Leo Kempf is imaginative, functional and sustainable. It’s made out of cardboard with a highly recycled content and hardboard from compressed secondary wood fibers without formaldehyde and resin. The designer uses birch spacers to add strength to the Speech Bubble Coffee Table so that a person could even sit on it."
eco-chic-design.com July 2009

