Without some form of gasket, the mason jar white plastic lids are not airtight. Quality Reliable Products Mason Jar Silicone Seals fit snug into mason jar white plastic lids. We tried the narrower red rubber seals with the smaller outer diameter. They tend to become displaced while tightening the lid, and unfortunately, they did not keep our fermentation jars airtight (see photo). Our reliable seals provide a perfect airtight, anaerobic enclosure while fermenting Kimchi (vegetables) or Kombucha (tea). Metal vs. Plastic Lids use for fermentation and storage of fermented foods? We find that whatever we are fermenting does not normally come in contact with the lid during fermentation, but however, may briefly come in contact with the lid during storage. We’ve done the research, which reveals that metal shouldn’t be used during fermentation, nor for storage of fermented foods. We use these Fermentation Lids for fermenting Kimchi, and during the second stage fermentation of Kombucha in Quart and Half Gallon Mason Jars. Please be advised that you are supporting a Christian ministry with your purchase. An “Our Daily Bread” Christian devotional is included as a FREE GIFT with most orders. If you would find this gift offensive, please contact the Seller when placing your order to request that the devotional not be included in the package. Please refrain from placing an order with us if you don’t want to support a Christian ministry or if you intend to leave hateful rude, arrogant feedback regarding the gift. We greatly enjoy and appreciate receiving positive feedback regarding the purchased products, our shipping service, or the gift. God bless you and THANKS FOR SUPPORTING WORLD ORPHANS via SHINE IN THE DARK COMMISSION, A MEMPHIS INNER-CITY 501c3 CHARITABLE MINISTRY!
- SUPER FAST SHIPPER EVEN SHIPPING ORDERS RECEIVED BY 7 PM CST ON SATURDAY! (unless handling time is set for more than 1 business day)
- All parts are BPA-free Food Grade; 12 WIDE MOUTH Mason Jar Plastic Caps with 12 Silicone Grommets installed, 12 Silicone Seals, and 12 Rubber Stoppers; JAR, AIRLOCK, AND DRINKING STRAW NOT INCLUDED
- THE QRP WIDE MOUTH SEAL IS THICK AND WIDE ENOUGH THAT THEY PROVIDE AN AIRTIGHT FIT AND CANNOT FALL OUT WHILE PUTTING THE LID ON THE JAR … THESE ARE THE BEST WIDE MOUTH SEALS ON THE MARKET GUARANTEED!
- Silicone Grommet installed to side of Lid to leave space for labeling and for ease of use for straw as drinking lid
- BONUS: A FREE GIFT of an “Our Daily Bread” Christian daily devotional is included with each order. If you aren’t interested in receiving the booklet, simply send a message when placing your order and request that we withhold the gift. Thanks for your consideration!