Its most innovative one to do these days that many of them won't do. Nowadays people's life style forced most of them to have their food in hotels and they are longing for homely foods and people who work in office will find hard to go out and have their food. Dabbawala will score in both the cases. You may ask that online food delivers like swiggy, zomato, uber can also deliver that to them. But they can't order daily and they won't get homely foods there. All you have to do is get order from a company and fix a menu for each day. prepare quality foods and deliver on time. Later you can collect boxes from them. In future you can get orders from many companies and expand your business.