A jar is a rigid, approximately cylindrical container with a wide mouth or opening. Jars are typically made of glass, ceramic, or plastic. They are used for foods, cosmetics, medications, and chemicals that are relatively thick or viscous: pourable liquids are more often packaged in a bottle. They are also used for items too large to be removed from a narrow neck bottle.
The glass jar is often an essential for any kitchen cupboard. They can be used to preserve or store items as diverse as jam, pickled gherkin, other pickles, marmalade, sundried tomatoes, olives, jalapeño peppers, chutneys, pickled...