Jar of carrots is used to preserve carrots longer than their standard 4 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.
Carrots cannot be eaten directly from the jar, therefore the jar must first be opened, returning the carrots, with their usual freshness.
Carrots can be pickled to preserve their lifespan by using sugar and vinegar.