I've recently learned about an amazing traditional lunch delivery service in Mumbai:
The dabbawalas constitute a lunchbox delivery and return system that delivers hot lunches from homes and restaurants to people at work in India, especially in Mumbai. The lunchboxes are picked up in the late morning, delivered predominantly using bicycles and railway trains, and returned empty in the afternoon. They are also used by meal suppliers in Mumbai, who pay them to ferry lunchboxes with ready-cooked meals from central kitchens to customers and back.
Is it possible for a tourist to order a dabbawala lunch?