The easiest way to carbonate beer. This is a Cornelius keg lid with built-in carbonation stone! Move the lid from keg to keg to carbonate as needed. Allows you to force carbonate quickly using the attached .5 micron stone with the portability of being able to move the lid from keg to keg. No more hassles of trying to attach and unattach line from the “gas in” dip tube. Simply connect your gas quick disconnect to the included fitting on the lid and allow carbonation to begin.