Do they still make the 6.5/5.0 bigmouth bubblers anymore? All I see are the glass ones...
I've still got several out in my shed, but I haven't used them in years. Don't remember having issues with sealing, but I mostly used them for fermentation, with secondary in glass carboys. Quit doing that nearly 10 years ago when I went all-in with stainless steel fermenters and a unitank. Never looked back. Neither did I get rid of the Big Mouth, and Spiedel fermenters, along with 7 or nine (?) 5 gallon, 6 gallon and 6.5 gallon glass carboys, but they get used for bulk aging of wines before bottling.I think they stopped making them, as they were having difficulties getting them to seal properly. You can still find some 1.4 gallon versions, but that's all. Most people I know who use fermenters like that use the Fermonster now.