kasdk

They've been doing this in Scotland for decades (50yrs?+), you take the glass bottle of IronBru or cola back to the shop or mobile-van-shop and you'd get 10p or something back (it's probably 20p or more nowadays).

I also note in Poland and Czech Republic glass bottle beer always costs a little more than the sticker price so I presume there is some $$ in returning - a nice little tip for the airbnb cleaner after a month.