Penny on the bottle.

Scotland is discussing whether to bring this old idea back to life it seems.  So you would pay more for your can or bottle of drink, but would then get this extra back when you returned your empty can or bottle to the shop, or other approved collection point.  Commonplace in my childhood, and worked well.  The driving force behind this idea is not so much to encourage recycling, but to discourage people from littering the countryside.  All very admirable.but critics point to the possible negative effect on sales and also the scope for what they describe as "fraud".  Don't quite see it as fraud myself, but what they're on about is, at the one end people rummaging through other people's bins in search of discarded cans or bottles, and at the other end people bringing car- or lorry-loads of cans or bottles over the border from England to collect the returns.  Still just a proposal at present, so watch this space.