Recycling deposits in Germany

In the U.S., certain states require a deposit for aluminum cans and plastic bottles. Hawaii, for example, has a five cent deposit. In Michigan, it's ten cents (which inspired Season 7 Episodes 21 & 22 of Seinfeld).

You pay the deposit at the store when you checkout; to get your money back you have to return them to a recycling center. This inconvenience creates an interesting form of wealth transfer. Returning recyclables isn't worth a lot of people's time, but can be a supplemental form of income for those who do. On my trips to turn in our household recyclables, I remember seeing folks with 55 gallon trash bags *filled* with crushed aluminum cans.
In Germany, it's bit different. The deposit is 25 cents, but returning the bottles is way more convenient. Every grocery store has a machine like this. You feed the bottles into the hole at the top, it scans them for the "this one's eligible" symbol, and you get a slip when you're done. When you check out, that slips counts gives you a credit to your grocery bill.

The convenience makes recycling a way of life in Germany. In Hawaii, it was more of an "only poor people do that" kind of thing.

I can't decide which one i like better.