Leak Proof Platinum Silicone Sealing Lid Liners for Mason Jars 10 Pack

When I decided to invent this product, I was trying to solve two common problems with Mason jar lids: either they leak (like the plastic Ball lids), or they are not food safe (like many decorative lids). These flat, round discs solve both problems! The food only comes in contact with the silicone, and they make many lids airtight and watertight.   They can be used to line the inside of most Mason jar lids, making them leak proof and keeping the contents of your jar from touching the lid. They work well as liners for white plastic Ball storage caps, MJL plastic and stainless steel storage lids, and most of our decorative lids. Make almost any lid food safe and leak proof! They have a groove to fit the jar tightly and a tab for easy removal.   They also make great fermentation valve lids. Just poke a pin hole and they function just like more expensive silicone airlock lids.   Made of uncolored platinum cured LFGB (European grade) silicone rubber, these lid inserts are dishwasher, freezer