Kombucha is a tea based fermented drink that has become very popular in recent years for its supposed health benefits. 

Kombucha is made by fermenting tea using a "symbiotic culture of bacteria and yeast" (SCOBY). The yeast component typically contains saccharomyces cerevisiae (instrumental in beer, wine, and bread making) as well as other species. The bacterial component almost always includes Gluconacetobacter xylinus to oxidize yeast-produced alcohols to acetic and other acids. After water, acetic acid is the main component of vinegar and gives vinegar its distinctive flavour.

Below are some websites that provide further information on kombucha and how to make it at home.

Arbor Teas - How to make Kombucha

This page provides a comprehensive guide to producing your own kombucha at home.

Delicious Obsessions - How to make Kombucha - A Beginners Guide to Batch Brewing

The blog post provides a step by step guide to brewing kombucha aimed at beginners.