Symbiotic Culture of Bacteria and Yeast (Scoby) is a dense, round, rubbery, and opaque with a vinegar-like smell used in the making of our kombucha. The jellyfish-like structure of the Scoby is comprised mainly of insoluble fiber known as cellulose. It nestles a variety of yeast and bacteria species that aid 1980 BCB Kombucha’s fermentation process.