7pack Maintenance free airlock waterless fermentation lids for wide mouth mason jars. Make Sauerkraut, Kimchi, Pickles, any fermented vegetable probiotic foods. BPA free, mold free, dishwasher safe.

I’ve been fermenting just a couple of years and have tried a lot the of gadgets and gizmos that are out there. These silicone lids eliminate the need to “burp” your jars, fit easily with ring screw bands that you probably already have, and the handy date dial on top also eliminates the need for sticky notes or markers to remember the “done by” date. I appreciate the fact they didn’t come with a bunch of useless plastic add on things that just cause more waste. They were packaged in a compact cardboard box, love the efficiency of this product all the way around. Highly recommend!

We purchased this item a a fraction of the local cost and it does what it was purchased for.

Perfectas! Totalmente lo que esperaba

I've had perfect sourdough starter since using these lids. Never a problem, perfect rising, and perfect fermentation. Forget cheap options like cheesecloth or foil, buy these. Money well spent!!!

They work properly and even prevent contamination to a point when our tomatoes & garlic ferment started creating a vacuum after a couple months.