If the Kerr jars and their packaging looks eerily similar to that of Ball jars, its because theyre basically the same: Both Ball and Kerr brands are now owned and manufactured by the parent company Jarden.

Are blue Mason jars worth anything?

If you have a jar with one of the older logos, it will likely be worth more than one with a newer logo. Next is the color. Clear and pale blue are the most common colors, but jars of all colors were produced. Some of the rarest jars are antique green glass jars of certain shades, which can fetch up to $300.