The Carbon Dioxide (CO2) Degasser cap is a one way valve that fits into a standard glass Italian carboy (#6.5 bung). Apply a suction from a vacuum sealer and this cap will maintain the negative pressure inside the vessel to “pull” CO2 out of solution. An elegant alternative to drill based or human powered stirring for degassing.
If you need a different size bung (i.e. for a BetterBottle), please specify bung # at checkout in the “notes” field.