Kombucha has become pretty mainstream in the last few years. I remember when I first heard about it in the mid to late 90s when Jeff had an acquaintance that had a vat fermenting in his backyard. I was a little unsure at the time.
But when we moved to Oregon over ten years ago, I started seeing it in grocery stores and started drinking it. Wonder is my favorite brand, but it's often difficult to find the original, as I usually see the fruit juice flavored varieties; I'm sure they're good, but maybe I'm a purist. I recently tried another brand and found it to be watered down in taste...and frankly not tasty at all.
If you haven't tried kombucha, it's a mixture of tea and sugar left to ferment. Like vinegar, it needs what is called a "mother" for the fermenting process to work...and like vinegar, it tastes a bit vinegary. And it sparkles. I find kombucha to be great with foods that are fried (fish and chips, perhaps) because it cuts right through the grease and even seems to aid digestion (no, I'm not getting paid to say this!).
Anyway, give kombucha a shot if you haven't and I'd love to hear about your favorite brand or any tricks to making it at home!