1976 Tupperware 2-Quart Beverage Container - Seals in Freshness - Vintage Ad

This original 8.5 x 11" magazine ad from 1976 features the iconic Tupperware 2-quart beverage container.  Didn't every household in the seventies have this item and many other Tupperware containers in their kitchens?  I think someone was having a tupperware party every other week back then!