SOPHICOSilicone Fermenting Lids, Waterless Airlock Fermentation Tops Mason Jar Lid Fermenter Caps for Pickles, Kimchi, and Fermented Probiotic Food - 4 Pack, Wide Mouth (Jars Not Included)

Love them

work great for fermenting vegetables. I like cauliflower and carrots best. Adds tang to salads, good for snacks, and good FOR you.

To be fair I haven't used yet but material is good quality and I feel will be easy to use.

These work great for storing dough dough starter! These lids protect the fridge from explosions if starter gases.

I lacto-ferment cabbage at least once every other week. I love these because they fit my existing mason jars and can continue to be used as a lid until I am ready to ferment up more saurkraut; did I mention that they're also super easy to clean and durable?My ferments have come out perfect every time I use them, you get a better seal than using the finger-tight method, and adequate venting only when needed; I love these lids.

I like that they fit in the jar opening and don't need to be screwed on/off. Just press the top to vent. Easy. So far, so good!

I had these for a batch of fermented ginger-lemon honey, and they performed well. The ease of access is an advantage over the fermenting lids that require bands. The disadvantage (with most any fermenting lid) is the possibility of leakage if it gets knocked over.

These lids work well but to be sure they don't pop off while fermenting veg, I snip the little tab off then use a mason jar ring to secure them on the wide-mouth jar.