Lids with plastic-coated linings or specialized preserving jars with glass tops and rubber sealing rings are essential. Never use paper or cellophane covers for pickles (or chutneys) as the jars need to be completely airtight. If the jars are not adequately covered, the vinegar will evaporate and expose the ingredients to the air and harmful bacteria. The preserve will shrink and the top will dry out.
Avoid using metal tops for jars as the vinegar in pickles will corrode them, leading to possible rust and contamination. If the vinegar does evaporate during storage, top it up with more as the ingredients in the container should stay covered.
** Asian Pickles and Chutneys