SonyLiv
Founded by brothers Dhaval Prakashbhai Nai, 20 and Jayesh Prakashbhai Nai, 22, Mahantam is an early-age startup making automatic tea glass washing machines for roadside tea stalls. Dhaval, who designed the machine, learned machine design from YouTube and worked with scraps to build the design. Impressed by the brothers’ determination and vision, all five sharks–Mittal, Gupta, Bansal, Singh and Thapar–invested ₹30 lakh in the company, for a 20% equity stake.