This isn't theoretical any more. My state (tamil nadu/india) has banned plastic bags and cups .. generally what we might think of as single use. You have to take your own bags or (in some shops) buy reusable+degradable cloth bags. There are also grocery shops like "eco indian" to which you take your own containers, fill them up, weigh and pay. That's how we used to do it when I was a kid, but it all went plastic after that. Glad to see it coming back. Covid threw another curve ball but the ban hasn't changed. Next up should be food packaging.