In 1937 Tupper began working for DuPont, but left after a year and in 1938 formed the Earl S. Tupper Company. His company advertised the design and engineering of industrial plastic products, but later invented and marketed a popular product for home use, Tupperware.
Papers documenting inventor Earl S. Tupper; his invention, Tupperware; and the Tupper Company.
Earl S. Tupper Papers, ca. 1908-1989, 2003, Archives Center, National Museum of American History