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Kombucha is a living drink. For home brewers and commercial brands alike, packaging "the booch" presents a unique challenge: managing the secondary fermentation (F2) and carbonation. While glass bottles are traditional, PET Cans are becoming the preferred choice for safety and convenience.
The Challenge of "Bottle Bombs": In glass bottles, if the yeast continues to eat sugar, CO2 pressure builds up. If it gets too high, glass can explode—a dangerous mess.
PET plastic is flexible. If your kombucha over-carbonates, the bottom of the can will bulge out. It won't shatter. This is a crucial safety feature for raw, unpasteurized kombucha.
Brew your sweet tea and let the SCOBY do its work as usual until you reach your desired pH and taste profile.
Strain your F1 kombucha into a large vessel. Add your fruit juices, ginger, or herbs.
Sugar Check: Remember, the yeast needs a little sugar to create carbonation in the can, but too much will create a geyser. Ensure your sugar calculation is precise.
Pour your flavored kombucha into the Clear PET Cans.
Seal the cans using your seaming machine.
Conditioning Phase: Leave the sealed cans at room temperature for 1-3 days (depending on your recipe) to allow carbonation to build up naturally inside the sealed environment.
The "Squeeze Test": This is the best part about plastic. You can literally squeeze the can. When it feels rock hard, you know carbonation is ready.
Once the cans are hard, move them immediately to the fridge. Cold temperatures put the yeast to sleep, stopping the fermentation process so the cans don't over-carbonate.
Because the can is clear, customers can see the natural sediment or "baby SCOBY" strands. Use your label to educate them that this is normal and a sign of a healthy, living probiotic drink!
