Do mason jars keep food fresh longer?

Online Answer
Usually, when you wash and cut your produce, their shelf life is limited to a couple of days. But, when I put them in mason jars after prepping them, they last a week to a week and a half. Because mason jars are air tight, they keep the produce from spoiling as quickly..
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Cooking in Mason jars is nothing new. ... The glass used for Ball and Kerr canning jars is not tempered for oven use and is not meant to be used in baking projects. The jars are safe to use for home canning recipes, cold or room temperature food storage, crafting, and cold beverages.
But that's not the only thing that makes Mason jars terrible cookware. ... The glass used for Ball and Kerr canning jars is not tempered for oven use and is not meant to be used in baking projects. The jars are safe to use for home canning recipes, cold or room temperature food storage, crafting, and cold beverages.
Again, a wide-mouth mason jar is your best best when it comes to freezing anything, especially when it comes to soups and stews. This is my favorite Wide Mouth Funnel for filling mason jars to freeze.
Freeze It. ... While you can freeze larger quantities in glass mason jars, and many broth lovers do, you run the risk of breakage as liquids expand during freezing which can crack your jars resulting in wasted. Further, the smaller cubes of broth thaw faster than full jars.
(The cooking time will vary depending on your soup.) Allow jars to cool for 24 hours. They may be stored in a cool, dark place for up to a year..