This document provides an overview of the Mumbai Dabbawala system through a presentation. It defines a Dabbawala as a person who collects, delivers, and returns lunch boxes for workers in Mumbai. It details that over 5000 Dabbawalas deliver over 200,000 lunch boxes daily across 70 km using bicycles and trains. The system has very low error rates and the Dabbawalas have operated for over 124 years with no strikes or legal issues, demonstrating it is one of the most efficient supply chain systems in the world.