If you're going to mandate refillables for daily use life items, one should consider standardizing the size, shape, volume of these prepackaged goods. One can deduce that by doing so makes it easier for a consumer to not only store, price compare, and dispose of responsibly all the while reducing waste. Right now the entire plastic packaging landscape is unsustainable.
Then look at takeout containers - if we truly cared (environmentally and long term health-wise), there should be a reusable container system at a higher governmental level rather than at a single restaurant level. Right now we have managed to reign in some use of plastic (bags and straws). Most places charge for plastic bags and often takeout containers now, but these are single-use (sometimes these are baked in to the price). A creation of a reusable system (collection, delivery, sanitization - think of the new jobs created!) where it would be deployed in population dense regions would reduce the amount of these single-use items. How to we fund it without breaking the bank? It's not hard to see what we already do with plastic container deposits, but also allow advertising on such containers - the key is scaling the operation. I am aware that there has been attempts, but not with the involvement at a higher governmental level.
I know this was a call for small policies, but government policies are usually never small.