rarenovareed

You take it back to cart storage if you need the money back to switch for money. If you don't take it out, the store worker will do it when closing the store.

I just hold on to one in case I need it in my wallet.

In Estonia you can just pick up a little plastic tag that fits in the coin slot from the store infodesk, it's actually really simple.

Interesting, in Estonia it is quite the opposite. Waze is almost always better at routing than google maps. Just this summer I had a car trip to one of our islands where google maps directed me down a road that got increasingly worse. We almost reached the coast but got stuck 50m before the campsite when the road turned to sand.