It's a great idea to a point.
For me, I never go out to the supermarket, it's delivered. Secondly my council are actually very good at recycling so it's already collected so if I have to drive out to drop bottles in then that's stuffing a load of unnecessary pollution into the atmosphere.
However I'd like to see it rolled out - anything to stop this horrible plastic problem many of us saw coming years ago. Now we just need to move to stop using "plastic" as much as possible in things like clothes which are hardly worn then dumped.