This is a wonderful idea! A friend and I had a very similar model in mind and it's wonderful to see how far you'll have reached. All the best! Could your idea even be adapted for people who order food in? Also are there different-sized boxes for varying food quantities across establishments?
Rajesh We were envisaging the use of wax paper (the same material which the soap papers themselves will be made out of). The packaging will wrap around the sheaf of soap papers like an envelope and can be fastened with a wax seal or jute twine. The third image has this illustrated on the right-hand side. I hope that answers your question!