This was a quick and dirty proof of concept, but it was so simple it seemed like someone would enjoy it.
The printable mold was cast in aluminum, allowing picks to be injection molded at great speed from recycled plastic bottles. Some picks are HPDE and some are PET. The printable pick is attached as well for those of you who simply want a pick you can hang on a key chain or necklace. [the blue one was made from old PET vodka bottles]
Video of the injection molding process. Not a guitar pick.
Casting link here: