Faux Kombucha

I like kombucha but can't tolerate any amount of cafeine at all so wanted to come up with a no cafeine alternative.  As it turns out it's just not possible to make kombucha from herbal tea.

I've come up with the following kombucha-like herbal tea drink that is pretty easy to make myself.

2 quarts boiling water
3 - rooibos tea bags
1 - licorice mint tea bag
1/3 cup stevia
1/2 cup vinegar or lemon juice
Chill overnight in the frig

To serve:
Fill a glass 2/3 full with tea and three ice cubes; then fill with soda or seltzer water.