In 1859, an American named John Landis Mason solved the challenge that the Frenchman Nicolas-François Appert had not quite mastered the better part of a century before. Mason patented the threaded glass jar with a metal screw-on lid. This provided a perfect seal and made it possible to preserve all kinds of foods that would previously spoil. The Mason jar became a huge hit everywhere, though Mason himself scarcely benefited from it.
