As one of the world's richest men and most active philanthropists, Bill Gates usually has his hands full. Just not with poop. So it came as a surprise when the founder of Microsoft brandished a jar of human waste at a forum on the future of the toilet in Beijing on Tuesday.

The stunt was an effort to draw attention to a problem affecting developing countries around the world: not enough toilets. "In places without sanitation you have got way more than that," Gates said, pointing to the feces inside the clear canister resting on a table.