Up until the dorky voice I didn't believe you about medieval plastic, but now after hearing it I definitely believe that 100% factual statement.
Z
2017-06-29 10:55:02 +0000 UTC
Ah yes, in the late middle ages, innkeepers made their own plastic out of whale blubber. Of course this is a fantasy setting, so the plastic is probably made out of dragonfire and unicorn tears. Alchemy 101!