How do they know the Greeks drank beer, mead, and wine at the same time, instead of at different times from the same cup?
They must be liberals. Can't think straight, so they conclude that the drinks were mixed.
Try quaffing a mixture of beer, mead and wine, have 2 or 3 in an hour , and you might as well be drinking mustard and water. Not to mention that if you manage to keep it down, there's hell to pay on the nether end.
I doubt that human physiology or gastrointestinal metabolism has changed that much.
Its a no brainer that the vessels were used to drink different beverages at different times. What you drank was driven by the seasons.
Beer in winter, wine in late summer and fall, and mead in the spring and summer.
Only the wealthy could afford to store and brew out of season.