Which packaging innovation, introduced in 1965, revolutionized retail by enabling product freshness verification and is now used on over 80% of food packaging worldwide?

The evolution of product packaging has dramatically transformed how brands connect with consumers and manage product lifecycles. Some packaging innovations have become so iconic that they've revolutionized entire industries, creating new markets and changing consumer behavior forever. This trivia question explores a groundbreaking packaging discovery that altered the retail landscape and brand marketing strategies. Test your knowledge about this significant moment in product packaging history!

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The Time-Temperature Indicator (TTI)
The TetraPak aseptic packaging system
The UPC barcode system
The oxygen scavenger sachet ("Freshness Packet")