Question: how old are mason jars?
Answer: In 1858, a Vineland tinsmith named John Landis Mason (1832–1902) invented and patented a screw threaded glass jar or bottle that became known as the Mason jar (U.S. Patent No. 22,186.) From 1857, when it was first patented, to the present, Mason jars have had hundreds of variations in shape and cap design.