Which famous product design has remained virtually unchanged since its 1915 invention, with its distinctive contour shape becoming one of the most recognized forms in the world?

Breakthrough inventions and discoveries often come with revolutionary product designs that become iconic. Some designs are so innovative they remain largely unchanged for decades or even centuries. This trivia question challenges your knowledge about a legendary product design that has stood the test of time while revolutionizing an entire industry. Test your knowledge of product design history and innovation!

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• The Coca-Cola bottle
• The LEGO brick
• The Swiss Army Knife
• The Zippo lighter

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