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

A fun experiment that works on summer produce.

This is a great product for fermenting veggies. I love that you can set the dial to keep track of the date that you stared the ferment. I also received a free PDF of fermentation recipes.

These work as advertised. However the burping apparatus isn’t the upward triangle: that’s just for indicating when you started your ferment (there’s a ring of embossed 1-31). The burp “system” is just the fact that the center piece is shaped a bit like a Oreo cookie so the narrower part in the middle goes into the hole in the middle of the second outer silicone part. There are a few holes that are covered via friction with the centerpiece, but in case of catastrophic pressure the centerpiece would just be dislodged or possibly shot out. I sound like I’m criticizing it but it works quite well. I just wish the date indicator wasn’t so upright as now I’m unable to put anything on top of these as they’re fermenting. Perhaps that’s to prevent excess downward pressure on the system, but I’d still consider that a slight design flaw. I love all silicone products though: durable, heat resistant, it’s great. So far I’ve made four mason jars of sauerkraut which is soooo much better than store bought, and you make your own probiotics at home.

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!

I use these lids for my sourdough adventure. They work great. I’ve had no issues of mold growth while making sourdough when I use these lids and clean jars. As a bonus, the seller gives you a free recipe book which I look forward to trying. They wash up nice in the dishwasher as an added bonus.

Quality product. Works well

work great and make fermenting hassle free

Seems to work pretty well. Make sure you don't overfill the vessel and put a bowl under it during its most active fermentation period.

Perfectas! Totalmente lo que esperaba

These are wonderful, I love them! What I especially appreciate is you can set the little dial to the date you started your ferment.