Talk:Islander/@comment-2A02:A31C:3F:600:48FA:79B4:DCBC:CB7B-20170908143348

"Curiously, immediately upon supper’s conclusion the eldest takes the piece of bread sed aside at the start of the meal and places it in a large amphora. When an amphora becomes full, it is filled with boiling water and a beverage is brewed which in taste somewhat resembles classic  beer, though it is much weaker."

This is called kvass, it's a beverage of Slavic origin. You can look it up on Wikipedia.