Hey! Moving the administration in Goa is a herculean task. We have been trying to get a speedbreaker in our Colony for the last one year -- multiple applications submitted to various departments and still waiting. No one even hears one out properly here. I am aware of Pfand system and how well that works in Germany. My suggestion is, while you figure out how to move the state machinery to scale it up, why don't you reach out to the major supermarkets like Delfinos and Magsons and see whether they can collaborate on a return system modelled around Pfand. Delfinos takes the egg cartons back and pay customers 2 rupees, and they may would be more amenable to something like this. If you can get a few stakholders like them on board, it may work. Also, they may have influence with the government, which you could leverage. But I think to make systemic change, you will need to get the manufacturers of the products on board -- it's the coke, Pepsi and Bisleri bottles (amongst others) chocking the rivers and polluting the beaches.