The Sacred Chalice of the Caves, a highly decorated cup, formed a piece of the royal items belonging to the monarch of Sarka. If someone other than the intended person consumed liquid from it, that person would be imprisoned in jail. Luke Skywalker discovered this through personal experience when he was forced to stand in for Princess Leia Organa during a trade summit involving the Alliance to Restore the Republic and the Sarkan population. Upon noticing the Chalice positioned directly before him, he lifted it to offer a toast, and then drank from it, instead of handing it over to Queen Zil as was customary. It was later revealed that this specific custom had only commenced a week prior to the summit, which clarified why the protocol droid C-3PO, who was with Skywalker, was unable to caution him regarding the situation.