I think the behaviour that governments and the lobbyists want the citizens to adopt is one whereby they turn up to the supermarket with one or more robust, reusable grocery bags but this only really works when the shopping trip is planned. What somebody is supposed to do if they pop into the supermarket to buy more than two items on the way home is anyone’s guess, unless they fancy forking out a fiver for one of those robust, reusable grocery bags. I expect what we’ll find is people taking up the habit of carrying around a small, compact bag in case they need to do some unscheduled grocery shopping at some point in the day. During the good old days of the Soviet Union, the happy citizens would routinely carry around a string bag called an avoska, which roughly translates as “perhaps bag”, on the off-chance they would stumble across a store selling something worth buying and would be able to carry it home (before swapping it with a neighbour or friend in return for something they might actually want).
For some people, particularly middle-class environmentalists, forcing the masses to adopt practices common in the Soviet Union is probably seen as progress.