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Originator: Unknown. Date of origin: Circa 1949. Slogan: "Young America's Favorite" Notes: The size of the biggest bubble ever blown isn't certain, since bubble-blowing contests abound. (There's even a set of rules available from Bazooka.) One documented big bubble was 18 1/4" in diameter, blown in 1975. Children are the primary users of bubble gum, but 25% of the $68-million market belongs to adults, including some congressmen and movie stars.