I purchased 3 dozen each, of the wide mouth and regular reusable 'Tattler' canning jar lid system as suggested by UncleJoe. It consists of a plastic lid and a rubber ring, you use the standard metal rings. I made a traditional blackberry jam with sugar and processed for 30 min in a boiling water bath. I will do a product review when they have cooled and then about 1 month from now. Update, the lids seem to be tight and sealed as good as the common type, used fingernail pressure to test. Now I will wait, hopefully in about a month and retest, unless I get a urge to eat some more blackberry jam sooner. Update 7-2, one out of the 5 lids failed to seal, actually the first one in years that has not sealed while canning. I am very careful to check the rim for cracks and chips, and wipe it down after filling with a clean damp cloth prior to putting on lids. I also put the lids and rings in boiling water prior to sealing to soften and sterilize them.