From the city I come from in Southern India, few years back I have been introduced to Narayana, who founded a small scale industry which manufactures Edible cutlery.
It is a great environmental initiative yet sustainable as a business.
What is edible cutlery?
A spoon or plate, which you can eat it after consuming the food.
What does it solve?
It replaces the throw away plastic spoons which we use at parties, ice cream shops and other eateries. Especially street food is famous in India. All the small owners use cheap plastic spoons. By replacing them with edible ones, solves a major use case where we can prevent the use of plastics and yet make money from the business ( most of them are curious and interested in eating out the spoon ).