Dealing for Kombucha

I'm tired of spending $4 a bottle for kombucha, but I'm helplessly addicted to the stuff. Kombucha is a slightly sour, gently effervescent beverage made from sweetened tea cultured with a thick disk of bacteria and yeast known as a "mother." Seen in the hands of plenty a gym nut or hipster, it's one of the trendiest drinks out there, flying off the shelves of your local Whole Foods or health food store. Fans of the drink claim that kombucha helps to prevent cancer, aids in liver function, and is helpful in warding off colds, although, of course, these claims haven't been scientifically proven.