The Dabbawala system in Mumbai is a unique lunch delivery service that has operated successfully for over 100 years. It has over 5,000 Dabbawalas that deliver home-cooked lunches from people's homes to their offices using a simple coding system and the Mumbai local train network. Despite low literacy among Dabbawalas and no use of modern technology, they achieve extremely high performance with over 99.99% accuracy and no strikes in their history. Their organizational structure and strategies around equitable pay, welfare funds, and competitive collaboration have allowed this system to be sustainable for over a century.