The team is confident that the ancients really were quaffing some sort of cocktail from these cups, and that the residues aren't just the remains of a succession of different drinks. "So many of them show the same mix," says McGovern. "It's hard to imagine how all of them could have accumulated the same compounds unless the drinks were mixed up at the same time."
That makes sense. Not conclusive, but it's certainly a reasonable deduction.