Review on Maximize Fermentation with Masontops Pickle Pipes - Waterless Airlock Lids for Wide Mouth Mason Jars - Top Quality Silicone Caps by Keisha Smith

I have yet to test them out but so far I haven't had much luck with enzymes they use and stinks after weeks of waiting just to pour a gallon out of a cabbage. Many enzymes are moldy (blue/green and unsafe) or white Kama yeast (undesirable but tolerable). I seem to have had better luck with the Easy Fermenter lids so far, which is a shame as they were cheaper and I really wanted to love them. I bought this set to have more caps as I was increasing the number of batches I had at one time. Batches with these lids will likely fail if I need to add more brine or open for flavor before deciding to continue fermenting. I suppose this may be due to the inability to remove the air inside after a leak. I've had much better luck with these lids as I didn't have to open them until the day they were done and put in the fridge. Realizing that some of my actions have made certain enzymes more likely to fail, overall I find enzymes using these lids to be less forgiving than my other slightly more expensive, more feature lids. YMMV