Alexa Organics
About as plastic-free as a maker gets: the teething ring is a single piece of raw maple with no oil, wax, paint, or coating, so there's no plastic and no silicone or rubber either. The whole premise is subtractive - leave the wood bare and let it be the product. Nothing here is plastic dressed up as something else.
How clear are their specs?
It's untreated wood and they say exactly that - unfinished, no coating, nothing to hide behind. Materials are visible and the claim is simple.