Literally fridges next to a farming house with a QR code to pay (or cash) that sell some local cheese, milk and usually also some stuff related to the fridge owner. Also cold drinks and ice cream. Most my neighbors are small farmers and there are plenty of wandering tourists around so it makes sense I guess.

From what I know similar concepts are getting more usual in surrounding countries as well. It's honestly my favourite way to shop, I just take my pony mofa and drive to 2-3 fridges.