Anybody familiar with the workings of a Tupperware party will recognize the use of the various weapons of influence we have examined so far: reciprocity (to start, games are played and prizes won by the partygoers; anyone who doesn’t win a prize gets to reach into a grab bag for hers so that everyone has received a gift before the buying begins), commitment (each participant is urged to describe publicly the uses and benefits she has found in the Tupperware she already owns), and social proof (once the buying begins, each purchase builds the idea that other, similar people want the product;
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Example of multiple influence devices being used in succession.
