Mumbai has this solved, with the Dabbawala and Tiffin system. Tiffins are standardized reusable metal containers used for food delivery in Mumbai. The food can be restaurant takeout, or it can be a home-cooked meal someone sends you. Dabbawalas are the vendors who deliver the food, and collect the used tiffins/dabbas.

https://feedr.co/en-gb/c/blog/the-amazing-dabbawalas-of-mumb...

https://www.atlasobscura.com/articles/how-mumbais-dabbawalas...