[Biganon]

I've had stuff delivered to me packed with actual pop corn. Don't remember what it was, but a small object.

[bjackman]

Indeed - the packing peanuts use case and styrofoam use case are very different! Former is already solved by starch (dunno why polymer peanuts still exist, maybe we should ban them), latter seems a great deal harder, that's the claim made in OP's link.