Here’s a weird one: opened kombucha can actually get more alcoholic over time. If it sits out too long, the yeast keeps munching sugar and burping out alcohol. You might end up with a boozy, sour soda. Party in a bottle?
But the fizz is the first thing to go. Those precious bubbles escape with every open. After day three, it’s basically flat kombucha tea. And flat kombucha is like a deflated balloon—sad and pointless.
If you see mold, that’s a different story. Mold is fuzzy, green, or black. That’s your cue to throw it away. Kombucha mold is rare, but it happens if the bottle was dirty or the fridge is too warm.
How Long Does Kombucha Last? | Great Kombucha
How to Make It Last Longer
First rule: seal it tight every time. The less air, the longer the fizz lives. Use the original cap or a good jar lid. No half-open bottles dancing on your counter.
Second rule: pour a glass, then put it back in the fridge immediately. Don’t let it sit out while you scroll your phone. Those microbes are impatient.
Third rule: keep it near the back of the fridge. The door gets warmer every time you open it. That temperature swing speeds up the fermentation. The back is the cold, safe zone for your booch.
