Actually when I saw them at first I assumed it was one of those, but upon further inspection, it was a full metal thing and then I got the explanation that they come from a very pricey disposable thingy (I think it's Fauchon takeaway food).
Funk pops in particular are rather blob-like, their eyes protrude like raisins on a snowman so that casting is incredibly easy. For the intricate pieces (like a fish's fins) the main body just has holes, that then have a separate piece placed in them.
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