Probably one of the smartest tiny details a film maker implemented not to mention how all the fancy ones are gold plated and made of fancy material that takes a long time to bio degrade but the wooden cup if it wasn’t magical it would have disintegrated and become unusable a long time ago
… https://en.m.wikipedia.org/wiki/Shigir_Idol
https://news.artnet.com/art-world/zambia-worlds-oldest-wooden-structure-2367672
https://en.m.wikipedia.org/wiki/Nanteos_Cup
Polished wood can last for some time before going away…