A council poster on a road in Aarhus, Denmark, cars and bikes and houses in the background. The photo is of someone putting a cup back into one of the Resuable depost machines. The Danish headline, translated: '750,000 reusable cups deposited'. Before someone nitpicks: No, the machines don't give cash back. Apart from that, they are pretty universally user-friendly - you just contactlessly wave your bank card at the machine (or your bank app on your phone, if you have one) and your money gets put back in. There are machines on public streets and indoors at locations like the library cafe.
https://files.mastodon.green/media_attachments/files/113/854/688/931/863/560/original/e0180ed0e4026d57.jpeg