Remember, as a child many stood such a monster in a three-liter jar and it was called, God forgive me, tea mushroom.
Personally, I was afraid of this thing and there were suspicions that one day "it" will change the locks in our apartment and rewrite it for yourself.
Nevertheless, in Europe, an all-out boom for this drink, now called kombucha.
Overdoing children's flashbacks, tried ginger kombucha. No, no one can drink. Freshly, slightly sweet, seems a little carbonated; in the Internet write that even a little alcoholic, well, at least some pluses.