Earl Tupper (1907-1983) was a prolific inventor. It is known that his ideas included improving garters for stockings; way to remove appendicitis; pants that do not crumple; a new brand of cigarettes Sporty; the boat with the engine.
Unfortunately, all of these ideas were rejected by manufacturers. Tupper, after the loss of his business during the Great Depression, went to work on plastic plant, where he got the hang of the work on molding machines and began experimenting. The first results were beads and plastic containers for cigarettes.
But the real innovation was the Hermetic cup which Tupper patented. Raising the corner of the cover to release the air and then sealing tightly so that the cup was protected from air and water. Tupper began selling his invention in hardware stores in 1946, but it was too innovative and sealing sales were sluggish.