The FermZilla fermenter is made from durable industrial plastic that can be pressurized up to 2.4 BAR working pressure. Since the FermZilla is made from durable transparent PET, they allow you to see what is going on inside - even the yeast in action.
They not only allow you to ferment, but you can also use this vessel to clarify and carbonate your beer. You can clarify the beer without racking the liquid to another vessel as it has a yeast harvesting container, so you don't have to siphon the liquid to another container. This allows you can save the yeast for your future brewing projects.
