The local stores have some GT's, no originals all flavored, I might just try to start something from them. Unfortunately, there are not a lot of places that have kombucha around here. I really wish someone would write up an article that could get stickied about making a SCOBY. I know I've read a few things that say that you can't make one from a commercial bottle and some people have said you can.
You can absolutely make a scoby from a commercial bottle of kombucha. That's how I made both of mine. Unflavored booch is preferrable, but as long as the bacteria and yeast are still alive and active, it will work.
Ingredients:
- 1 gallon water, divided in two 1/2 gallon portions
- 1 cup sugar
- 8 single-serve black tea bags (unflavored, no Earl Grey etc)
- 1 16oz bottle of kombucha, preferrably unflavored
1) Bring 1/2 gallon water to boil. Reserve the other 1/2 gallon in the fridge.
2) Dissolve sugar in boiling water, stirring well.
3) Remove from heat, and steep tea bags in sugar water 5-10 minutes.
4) Remove tea bags and allow tea to cool. Add 1/2 gallon chilled water to speed up cooling and dilute.
5) Transfer tea to a clean fermenter, such as a large glass jar.
6) When tea is at room temperature (70-80°F) pour in bottle of kombucha, making sure to get all the dregs.
7) Cover with a clean cloth and store in a dark 70-80°F space, such as a closet (I keep mine at the top of my pantry).
Check back on it weekly. May take up to 4 weeks to develop a nice thick SCOBY, but you don't have to wait that long to use it (even a thin scoby will do), and the tea can be resused as starter tea for the next batch.
Edit: I don't know about GT or Synergy in particular, as I've never bought those brands. I know others have reported using GT's successfully.