Fermentation Lids for Mason Jars. Made of Maintenance free silicone airlock waterless and BPA free, Wide Mouth, 5pc by YUWANTING. (Green)

I really like the concept but... The ones I received are too small and when I go to screw the band on the lid falls into the jar. It is very hard to line it up, it needs to be a little bit bigger. I just received them today and it was my first time using them but it still should have stayed on the top of the mason jar.

I like the concept however when I skrew the band on the lid the Silicone catches and moves causing it to move out of position. I have yet to get any of them to stay put. Also tried putting slight pressure on the lids to cause it to concave so that way the band dosn’t catch however the lid tends to just fall into the jar if you push to hard.

I can't get these to keep from leaking. They don't seem to center and seal correctly on the standard Mason jars and rings. Had high hopes but I've given up after many of my fermenting jars leaked badly. Not worth buying.

Doesn't really fit on a standard mason jar.

DO NOT BUY!!!! Lids are too small for Wide Mouth Mason Jars..

Another review advises these kids are too small - I did not have this problem, they fit just like a regular wide mouth lid does. The jars burp themselves while keeping air out which makes fermenting a hands-off breeze!

I was quite disappointed with these. They came in a plain package with no description of what they were or how to use them. For a 1st time fermenter, trying to use these things was quite frustrating & they BARELY fit my wide mouth mason jars. In the middle of the fermentation process, the silicon lid popped from under the screw on part of a couple of jars. Needless to say....that fermentation process was cut short.

Didn't fit in a standard wide mouth canning jar. Made a real mess!