Developing the World Toilet Day logo was a real challenge.

How do you visually communicate something that is essential for privacy, dignity, equality, development and health but that looks different from one culture to another? We asked around, banged our heads against the wall until one day one of us remembered a cover from the magazine 'The Economist'. The cover has the French sculpturer - Auguste Rodin's- 'The Thinker' on a toilet with the headline "Will we ever invent something this useful again?"

We contacted The Economist who was happy to let us use their concept. Then our great designers reworked it against the backdrop of the globe.

We would like to thank The Economist for coming up with such a ingenious cover and for letting all of us  use it to raise awareness on one of our time's biggest development challenges: access to improved sanitation.