Which iconic food product was first sold in individual packaging in 1903, revolutionizing product marketing and creating one of history's most recognizable packaging designs?

Before the 20th century, most products were sold in bulk from barrels or generic containers, with shopkeepers measuring out quantities for customers. The evolution of product packaging revolutionized retail by creating brand identity, preserving freshness, and enabling self-service shopping. This trivia question explores a pivotal moment in retail packaging history that changed how products were marketed and sold to consumers worldwide.

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Kellogg's Corn Flakes, in waxed paper cartons with the now-famous rooster logo
Campbell's Soup, in the red and white labeled tin cans
Coca-Cola, in the distinctive contour bottle design
Nabisco's Oreo cookies, in the first twist-open packaging