What year (or decade) is this from?

I was changing the trash bag in the kitched earlier and had something fell down in the back of the cabinet. When I reached down to grab it I stummbled on this antique (?) cup of sour cream left from a previous tennant.

Does anyone know what year this might be from? I’m pretty sure it’s not sold anymore. It had the Migros logo on the back so must have been one of their own brands.

Not that it actually matters, I’m just curious😅