This piece evidently dates to the 1730s and is in a Polish museum. It was a tankard fit for a king, perhaps literally. I haven’t found out much else about it. Wouldn’t it be grand to quaff your favorite beverage from this, eh? https://commons.m.wikimedia.org/wiki/File:Museum_in_Poznan_-_Kufel_01.JPG
Looks like worn adoptive period coins that're always being dug up in hoards around eastern Europe, this contraption probably made from such a hoard I guess. Now make one from high quality siliqua or republican coins or even aureus, then we are talking!
Well, I have to say that the cap (tankard) will keep the bird droppings out of my brew whilst I sit quaffing my refreshment out in the beer garden. Don't do didley for my funky hat though, which I might add, keeps most of the foul discard off of me.... Aside: Have another scotch dear fellow