Which famous tagline originated as a solution to the problem of melting chocolates during transportation in warm weather?

Behind every successful brand is a memorable tagline that sticks in consumers' minds for years or even decades. But how well do you know the stories behind these famous phrases? This trivia question explores the unexpected origin of one of advertising's most recognizable taglines and how it transformed from a practical solution to a marketing phenomenon. Test your knowledge of advertising history!

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"M&M's melt in your mouth, not in your hands"
"Have a break, have a Kit Kat"
"Taste the rainbow" (Skittles)
"There's a glass and a half in everyone" (Cadbury)