I use any jar that the regular & wide mouth rings fit on & never had a problem. I have canned for years Had only a few break. I am working on peaches now. What really saves us money it we don't have to buy what I can. I belong to a gleaner group that picks the not perfect products that normally go to waist. We get a portion of what we pick & the rest is donated to 2 food banks, a small community for downs adults, a soup kitchen & the senior center. We picked close to 90 boxes of peaches today. Have any of you caners used the new lids with rubber rings? Both the lids & rubber rings are reusable. They are like what my grandmother used. I just got some to try & if I like them I will get more. They cost a little more, but as long as I can use them over & over, They will be worth it as our lids in this area are getting high.