As European that is not spread everywhere, while you can get some money back in Germany and Greece, there is none to be had in Portugal.
In Germany, it is such a big issue with people not having other source of income, that there is a culture where and how to leave the bottles around so that they are easier to collect.
I kinda prefer cultures where benefits and pensions are enough so that people don't have to dig into trashcans for Pfand.