The toilets of tomorrow are coming to New York City streets later this summer, officials announced Wednesday. Mayor Zohran Mamdani’s office inked a $4 million contract with the Washington, D.C.-based company Throne Labs to install high-tech, solar-powered port-a-potties in 17 busy areas across the five boroughs. The initiative aims to address the city’s long-running shortage of public restrooms. The loos have changing tables and sinks, and are similar in size to conventional bathrooms.