Better Brew Glass Demijohn 5L (about 1 gallon). Perfect for wine, cider, mead, kombucha and beer. Ca 32mm hole/opening for bung.Included:- 1st Better Brew Demijohn 5L- 1st Bung 29/35mm in cork with hole for air lock- 1st Bung 29/35mm in cork without hole (sealed)