OK, I got two of these:
Mr. Beer 20-21000-00 1 Gallon Heavy Duty Glass Fermenter with Spigot for Homebrewing Beer, Wine, Kombucha, Kefir or Cold Brew Coffee, 1.5 Gallons
And a package of #5.5 stoppers that someone said in the Amazon Q/A about this product said would fit the hole on top. The...