Unless it's a bottle deposit tax, then it gets added outside the advertised price ;) 2 Euro bottle of Coke, great, I have 2 euro left, pay 2 euro 20 please... Fawwwwwkkkkkkkkk
It doesn't matter what kind of bottle it is, or which company made it, all returns are accepted at every point.
Children, unemployed, and elderly people are often seen hunting for stray cans/bottles, by bins, in parks, and similar places, to return them for the cash.
Edinburgh Fringe special variant: charging extra for plastic cups and then not accepting returns.