I LOVE kombucha (delicious fermented tea drink thats heaps good for yr health!).
Back when I had a stable home, i brewed my own kombucha at home. Ever since being in this transient state, ive been looking forward to the day i have a semi-permanent home again so that i can brew again, especially since living in australia where you cant get store-bought bottled kombucha, and is nearly impossible to find a mother.
I generally dislike flavoured kombucha drinks, i like it in its original form, with the exception of one flavour. High Country's Wildroot flavour. is like a mash-up of rootbeer/sarsaparilla and kombucha, and oh, its a happy marriage.

ANYWAY, I had one a few weeks back, and was in recovery from surgery, so was doing a poor job of cleaning my room. I left an empty bottle of wildroot bucha with just a sip left sitting on my nighttable... for a week, or more. opps. So, I got up the energy to clean one day and brought all my recycleables downstairs, and was emptying all the liquids into the sink before putting them in the bin. When i got to the bucha bottle I tipped it over and heard a THUNK. whaa? I looked inside and there was a thick white think inside. Being familiar with kombucha cultures, my first thought was, oh my god, its a culture. It was definetly NOT there when i drank the bottle. So, I fished it out of the narrow opening that took some coaxing, but i got it.
At this point I was not 100% sure it was an alive culture. I mean, Ive never seen a mother just create itself out of nowhere. You need a kombucha mother to make babies. And furthermore, i was always under the impression that FLAVOURED kombuchas couldnt produce cultures. So, I quickly put the guy into a bowl, and luckily had some GT brand NON-flaved bucha in the fridge, so I bathed my dude in some for a starter, I made up a pot of tea, and I got a jar and made my bucha set-up.
Fingers crossed that in 2 weeks, it proved to truely be a culture, and not some old ass mold growing in a dirty bottle.