[seafarer]

I have a bunch of those cups, as does every member of my family and some friends (my mother has hers in a curio table with some deep-sea clam and mussel shells). It was pretty customary to decorate a bunch to go down on each of your own dives. On one ALVIN dive series off the Oregon coast, they even did a whole human torso. But that came out pretty weird - as do some of the heads (wig display holders actually). Many of those larger styrofoam pieces are cast in two halves and then joined to make the whole head/torso/body. Sometimes, the halves come from different batches of foam, and they compress differently, giving a kind of mutated result.

That article should have shown some of the shrunken heads - the cups are quite bland in comparison :p