This yeast collection container can fit the FermZilla fermenters and is primarily used for collection and addition of hops and yeast via the butterfly valve. This collectoin container can also be used for yeast starters meaning that you can create the yeast starter in this collection container directly then attach to the valve of the FermZilla so you can pitch yeast without needing to open the lid.  This collection container has been designed to work with the magnetic stirrer machine.