word usage - tupperware means just for tupperware product or plastic container in general? - English Language Learners Stack Exchange
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Time to stock up on Tupperware: Container company may be going out of business
What Do the Symbols on Tupperware Mean? (SOLVED With Examples) - Container FAQs
Tupperware party - Wiktionary, the free dictionary
Here's What The Different Tupperware Symbols Actually Mean
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Secret History Of: Tupperware | The Independent | The Independent