Kombucha tea is a fermented beverage made by adding a SCOBY (symbiotic culture of bacteria and yeast) to sweetened tea

https://texture-increase.unicornplatform.page/blog/a-journey-through-the-world-of-tea-discovering-unique-varieties

Kombucha tea is a fermented beverage made by adding a SCOBY (symbiotic culture of bacteria and yeast) to sweetened tea, resulting in a fizzy and tangy drink