ClearView Airlock (proof of seal!)

Unlike other airlocks and fermenting systems, our ClearView Airlock provides a quick and easy way to verify that you've got the necessary airtight seal for the fermentation process.  As the fermentation process progresses, escaping carbon dioxide gas (produced by the beneficial bacteria) will push the water in the airlock to mostly one side of the airlock.   This is expected and a visual confirmation that fermentation is progressing!

* Did you know? The cap is optional in brine pickling, (it's needed in wine and beer applications).