Which brand slogan holds the Guinness World Record for 'longest-running advertising slogan in continuous use'?

Brand slogans can make or break a company's identity in the market. Some have become so iconic they've set world records for longevity, recognition, or impact. This poll tests your knowledge about world-record-setting brand slogans that have made marketing history. Can you identify which slogan holds the remarkable distinction mentioned in the question?

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De Beers: 'A Diamond is Forever' (since 1948)
Coca-Cola: 'It's the Real Thing' (since 1942)
Maxwell House: 'Good to the Last Drop' (since 1915)
Nike: 'Just Do It' (since 1988)