Meet Ecotact, a company focused on changing the urban poor's perception of toilets. In the slums of Eastern Africa, open trenches and flying toilets are the go to methods of waste disposal. In many slums there may be one toilet for a thousand residents. That toilet is filthy. As a consequence, toilets are assumed to be disgusting. Ecotact is attempting to combat this perception and make toilets desirable destinations. Their primary draw is clean water. Ecotact's Ikotoilet malls double as community water centers. No one has to tell the urban poor how important clean water is. That's why the 27 Ikotoilet malls in Kenya serve over 30,000 customers. I've read about a variety of pay-toilet models, and paid for a few trips myself in Kenya and Tanzania. I think Ecotact's plan is smart. By tackling two major problems at once (water and sanitation) they've actually enhanced the effectiveness of their business. I wish them all the best.