Women gather at a Tupperware home party in 1958. First introduced in 1948, Tupperware home demonstrations were so effective at communicating the benefits of the revolutionary Tupperware seal, that by 1951, all Tupperware products were taken off of store shelves to be distributed in this manner. Almost fifty years later, the demonstration remains key to the success of Tupperware products. (AP Photo/Tupperware)