I'm not convinced - might have a small effect on littering, but most of the litter I see is stuff like chocolate bar wrappers and crisp packets that wouldn't be affected. Could improve recycling rates, but everyone I know already does recycling at home, so would mostly impact bottles thrown in public bins, which seems likely to be quite a small proportion of overall waste, especially as an increasing number of busy public spaces (eg train stations) already have recycling bins along with rubbish bins - maybe this should just be expanded. Making it easier to manage a system of reusable containers might be a benefit, but that doesn't seem to be on the table at the moment, and with modern technology I don't see why reusable containers couldn't be picked out of a recycling conveyer belt at the tip by a robot.
i do think this is a good idea if it's implemented german style where you return it to the store you got it from, very convenient (compared to say going to a recycling centre) and as a byproduct encourages you to bring bags rather than use up new plastic ones.
That's actually a good side effect tbf, being a bit of a memory aide for taking bags shopping. Out of curiosity though did the German scheme allow for taking bottles back to a different shop from where you bought them or is it strictly back to the point of purchase? Would be inconvenient for vending machines, trains, places you don't visit very often etc.
of course this being the uk people are going to complain because apparently stuffing a bag full of empty cans and taking it with you when you go shopping is just too much goddamn effort (these same people don't seem to get you can still throw stuff away, just that if you do it costs more)
Sure you could just put the bottles in your normal recycling, but it would be a pretty annoying feeling to be wasting moony like that for most people I think, so not really a good option.
It's not quite as simple as you make out I don't think. There's having to find somewhere to store non-recycling bottles etc until you next go to the shop (believe it or not many people's houses aren't actually that big, especially poor people and those living in HMO's etc who will be most sensitive to 20p here and there), inconvenience of having to carry them there with you (worse for someone that might go shopping on the way home from work after a walk / bike commute as I used to for example, so I'd have to carry round a bag of not-recycling all day and store it at work somewhere), and having to make extra trips if you would normally have had shopping delivered to your house. Also just general inconvenience of having another time wasting task to do at the shops.