A Mason jar, also known as a canning jar, preserves jar or fruit jar, is a glass jar used in home canning to preserve food. It was named after American tinsmith John Landis Mason, who patented it in 1
A collection of Mason jars filled with preserved foods
Home canning or bottling, also known colloquially as putting up or processing, is the process of preserving foods, in particular, fruits, vegetables, and meats, by packing them into glass jars and the
Mason jar
…A Mason jar, also known as a canning jar, preserves jar or fruit jar, is a glass jar used in home canning to preserve food. It was named after American tinsmith John Landis Mason, who patented it in 1858. The jar's mouth has a screw thread on its outer…
A 1914 advertisement for a combination steam canner and roaster. The described method will not protect against botulism.
Green beans in a pressure canner ready to be processed
Weck glass with rubber seal and steel tension clips. The red tongue pointing downwards indicates a correct seal