328ml Bottle. Essentially, Kombucha is a slightly effervescent fermented tea with a tangy taste. A culture of bacteria and yeast is put in a sweetened tea brew and the bacteria feed on the sugars converting them into organic acids which gives Kombucha its iconic tang. Good Buzz is not diluted and contains no artificial sweeteners. Good Buzz Feijoa kombucha is a tasty refreshing brew that's not-too-sweet and with healthy goodness to boot!