Jar of cabbage is used to preserve cabbage longer than their standard 2 days of freshness. After jarring, it is necessary to cook the jar of food in a heat source. Otherwise, the food will rot as fast as if it were not jarred.
Cabbage cannot be eaten directly from the jar, therefore the jar must first be opened, returning the Cabbage, with their usual freshness.
Cabbage can be pickled to preserve their lifespan by using sugar and vinegar.