Is it safe to drink kombucha from a plastic bottle?
Use caution. Kombucha belongs in glass when you have the choice.
What's actually in it
Kombucha is acidic because it is fermented. That acidity is part of the drink. It is also why glass is the better package for regular use.
A plastic bottle once in a while is not the main thing to worry about. A daily kombucha habit is different. You are choosing the same food-contact material again and again.
What the research says
A 2024 study in J Hazard Mater tested 50 packaged nonalcoholic beverages, including juice drinks, teas, soft drinks, sports drinks, and energy drinks. Every sample contained microplastics. The authors pointed to packaging materials and manufacturing or transport stress as likely sources.
A 2025 Sci Rep randomized crossover trial compared soda from cans, PET bottles, and glass bottles. It found higher urinary BPA after canned soda than after PET-bottled soda, and no BPA difference compared with glass. That means PET is not automatically the worst package for every chemical. It still keeps the drink in plastic contact.
For kombucha, choose glass bottles or brew in a glass jar. Avoid heating plastic bottles, storing them in a hot car, or reusing single-use bottles.