In a contest held yearly by the Bill & Melinda Gates Foundation, Caltech won 2012’s “Reinventing the Toilet Challenge” by developing a mobile restroom equipped with a solar-powered water-treatment system that could be used in areas without plumbing infrastructure. Kohler reached out to help Caltech bring their idea to life and contacted Open Door Design Studio (ODDS) to provide Indian truck art inspired designs for the exterior of the mobile restroom.