Which famous product tagline holds the Guinness World Record for the longest-running advertising slogan in history?

The Guinness World Records tracks remarkable achievements across many industries, including retail and marketing. Some taglines have made such an impact that they've earned recognition for their effectiveness, longevity, or cultural impact. Test your knowledge about famous retail taglines that have broken records in the marketing world. Can you identify which slogan holds a unique distinction?

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De Beers: 'A Diamond is Forever' (1948)
Nike: 'Just Do It' (1988)
Maxwell House: 'Good to the Last Drop' (1915)
Coca-Cola: 'The Pause That Refreshes' (1929)