Glass jars can be reused through multiple canning seasons. It is important, however to inspect jars and lids for chips, cracks, and dents prior to use. Rubber gaskets, on the other hand, should not be reused.
Numerous styles of jars existed, but the three primary styles were the threaded glass jar with a 1-piece porcelain-lined zinc cap, wire-bail, and threaded glass jars with 2-piece flat metal lids and attached rubber gaskets.
The screw bands of 2-piece lids are removed after processing and cooling.