OOPS, ...... I see KC beat me to it ........ but will post anyway.
Need a better description than just “3 or 4 inches tall”.
Is that a lid or just a reflection?
Is it like a “shot” glass or does the hole go all the way thru?
Anyway, ….. a wild guess, ……. it’s a “sniffer” or “tester”. 😊 😊
Put a liquid in it …… and then pass it “left” or “right” to sniff or taste ….. to get everyone’s opinion.
I’ll refine my “guess” if we find out more about it.