As an American growing up in the late 70s/early 80s, we called all die-cast metal cars “matchbox cars,” even though many (all?) of them were Hot Wheels. I never knew there were two competing brands.
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Because of this:
https://fr.wikipedia.org/wiki/Bic_(entreprise)
Up to this day many still say, on a daily basis, say, a "bic bleu" (blue ballpen) or "bic noir" (black ballpen).
And virtually everyone french speaking calls a refrigerator (fridge) a "frigo".
Then again, we've been calling a certain class of shoes "Adidas" since 1990s, so I shouldn't be surprised by the phenomenon. Not to mention, I don't think anyone in Poland ever used the generic term for a photocopier - we all call it "ksero" machines (from Xerox).