Which innovative packaging design feature, first widely introduced in the 2000s, allows consumers to see when a food product has reached optimal ripeness or freshness?

The food industry has undergone remarkable transformations in packaging design over the decades. From sustainable materials to interactive elements, packaging now serves multiple purposes beyond merely containing the product. This poll tests your knowledge about a significant packaging innovation that revolutionized consumer engagement and product freshness in the food industry.

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Thermochromic ink indicators that change color based on temperature
QR codes linking to recipe suggestions
Biodegradable packaging that dissolves in water
Vacuum-seal technology with pull tabs