SCOBY is a culture of bacteria and yeast. It's a thick, rubbery cellulose mat that's used to ferment kombucha and other foods and drinks.
How SCOBY is used
SCOBY is added to sweetened tea to create kombucha.
The bacteria and yeast in the SCOBY break down the tea's sugars into alcohol, carbon dioxide, and acids.
The result is a fizzy, tangy, sweet, and vinegar-like product.