Vending machines in Ireland(my home country) don't have a change button, they have a return coin button(no notes usually). And once you have bought something, i

Vending machines in Ireland(my home country) don't have a change button, they have a return coin button(no notes usually). And once you have bought something, if there is no change in the machine it won't give you any back. Some vending machines have small lcd's that say no change when out, most don't. And a can that should have cost Euro0.80 has now cost Euro1 or if your unlucky then Euro2(if you used the two Euro coin).