Preserving Water Kefir Soda

[tovohu]

Is it possible to preserve water kefir for longer periods of time? For instance, in pop bottles that have been capped? If so, how long can they be kept?

[AlexP]

Well, water kefir can technically last for years and won't go bad. It will just keep slowly fermenting, even capped and refrigerated. It will just keep using up the last of the sugar, until it becomes mostly acids / vinegar. Even then if you add some sugar, you could probably still drink it.

Alex