Foam Stopper - 1 3/4"

Foam stoppers are utilized to enable airflow in and out of a flask or alternative container while effectively preventing bacteria and airborne particles from entering.

This is particularly advantageous for fermentation purposes, such as in the case of Kombucha, where it is necessary to allow ample oxygen into the fermentation container while simultaneously alleviating pressure and safeguarding against environmental risks. The combination of a stopper and airlock solely facilitates the release of pressure, ensuring that no gases can enter the container.