On the edge of Plaza Easo there's a strange looking box, decorated in hypo-advert style with a cow and young boy.
Curious? Get a little closer, move around to the front, and you see two vending machines. But these aren't selling junk food or patatas.
For fifty cents you purchase a bottle (plastic or glass) and then fill it with fresh milk, carried down from caseríos daily for sale to donostiarras.
It's essentially a futuristic, realistic approach to eating local. And the milk really is tastier. Instead of coming in a cardboard box that for some reason needs no refrigeration, it's cold, thick and of a creamier white than typical leche.