One of my favourite things in Finland when I lived there for 8 months were the 'reverse vending machines'. You put in drink bottles and cans that have an eligible bar code and it gives you store credit you can spend at the participating supermarket. Or a lottery ticket if you feel lucky.
https://www.youtube.com/watch?v=irZlstzIHDw
Of course there had to be the one time where I collected 5 EUR worth of store credit, only to lose the coupon somewhere between the machine and the supermarket aisle... gah!