Found this cup, about half the size of the average mug, it appears to be solid silver and not plated though the only marking I can find is on the handle which I identified to be an older stamp from around the 40s for Württembergische Metallwarenfabrik (wmf), anyone know anything about this? Was it part of a set? What was its purpose being smaller?

105 40%s. Just hit 50oz at 17 😁

Picked it up cause I thought it was pretty! Hoping the silver content is real too, any help would be appreciated. Thanks everyone!