You can brew kombucha, a sweet-sour fermented tea in a continuous brew system. Continuous brew kombucha is easy to make, and it allows you to have a constant supply of kombucha at the ready.
Bring two quarts water to a boil. Turn off the heat, stir in tea and organic sugar. Continue stirring until the sugar is dissolved. Allow the tea to sit undisturbed until it cools to room temperature.
Strain the tea through a fine-mesh sieve into your continuous brew container. Stir in 6 quarts water. Add the kombucha mother and the kombucha tea to the container. Cover it loosely, and allow it to ferment about a week, or until you can see a new mother forming.
After a week, draw off up to 25% of the kombucha, bottle it, and replace it with an equivalent amount of sweet tea. After the initial week of fermentation, you can draw off kombucha as frequently as you like - usually 1 to 3 times a week - as long as you replace it with an equivalent amount of sweetened tea.
To bottle the kombucha, pour your kombucha into a flip-top bottle, adding up to ¼ cup sweet tea or fruit juice to the bottle. Close the bottle and allow it to ferment a further 2 to 3 days, then transfer to the fridge and consume when you like it.