Which packaging design technique, implemented by a major food brand in 2009, was found to increase sales by 10% through creating an emotional connection with consumers?

Food packaging design is a fascinating blend of art and psychology. Beyond simply containing products, packaging serves as a silent salesperson that can significantly influence consumer decisions at the point of purchase. Studies show that shoppers make up to 70% of buying decisions while standing in the aisle, and effective packaging can capture attention within milliseconds. Test your knowledge about the strategic elements that make food packaging effective in today's competitive retail environment!

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The 'smile curve' used by Lay's potato chips, where the curved bottom of packaging mimics a smile
Nostalgia packaging by Coca-Cola, featuring vintage designs that reminded consumers of childhood memories
Transparent windows implemented by Kraft, allowing consumers to see the actual product inside
Interactive QR codes by Pepsi that linked to limited-time games and promotions