Why Mason Jar Sizes and Specifications Matter for Storage, Packaging, and Home Use Mason jars have become common and are being used for many years now. They are known for storing and preserving food. Nowadays they are even being employed for drinking, storage, crafts, as well as decor. This is because of their rustic look and versatility. A mason jar tends to be a distinctive glass jar that includes a threaded neck as well as a two-piece metal lid. When choosing which mason...