Mumbai-based couple, Samit Choksi and Priya Vakil Choksi, has found a green solution to harvest rainwater and generate solar energy using Ulta Chaata (inverted umbrella). The couple runs a clean-tech startup Thinkphi that’s funded by serial entrepreneur Nimmagadda Prasad, who has earlier invested in successful companies like Matrix Laboratories, Care Hospitals, and also Sachin Tendulkar’s IPL team Kerala Blasters.