The swing top bottle keeps a tighter cap on the bottle for your 2F, but the fermentation process will still continue with using a Kevita bottle and cap. Metal Metal is a no as it can be harmful to your kombucha brew. Is the scoby hotel just for individual brews because with continuous approach you just keep adding to and reusing the same scoby? So you may find that this list is more like a set of reasons why I decided to go with a batch brew. CB allows you to make more Kombucha in less time using a larger vessel.
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