Our fermentation lid for Wide Mouth (3″ internal diameter) Mason jars will revolutionize your fermenting!
Super Easy – The “bubble” on the top has a slit cut in it. When pressure builds up in the jar, the lid bulges up. This automatically opens the slit and lets the CO2 produced by fermentation escape. No more burping and no more topping up the water in the airlock!
Be sure to pinch open the slit on the bubble before the first use. If you don’t see it, push the bubble inside out and pinch.
High Quality – Silicone rubber is dishwasher, freezer, and microwave safe. Silicone is a safe, non-plastic (BPA free) material for food use that does not leach any chemicals.
Rust Proof Band Included – Made of 304 grade 18/8 stainless steel, the band is also dishwasher safe!
One silicone valve lid, one stainless steel wide mouth band, and one heavy glass circle to push down the fermenting food per order.