[fishnchips]

In Poland (perhaps all of the Soviet bloc?) it’s always been a thing. I remember collecting them as a kid, competing against local drunks. It was hard to find one back then. These days they’re too cheap for most people to care.

[LeonidasXIV]

Also, Poland has a huge share of bottles that are not returnable, which is very different from Germany or the Nordics where all the bottles have deposit on them, even plastic ones.

(Whether you are able to return them is a different question, because the Danish system allows vendors to reject bottles that they aren't selling themselves, which is something Germany was quick to outlaw)