The Evolution of the Two Part Canning Jars and Lids System
Old canning systems used to have both canning jars and spring loaded lid systems – all in one.
The newer two part systems consist of a two part jar and lid system. When the lid or seal wear out, they can be replaced, and the jar is reusable. The only time you should not use a canning jar anymore is when it is chipped as the seal can be disrupted.
You can now purchase glass canning jars in flats with ten to twelve jars – lids and rings are included. Check out Wall Mart or Target for flats of canning jars and lids.