Which smart packaging technology was first successfully implemented by Sainsbury's in 2019 to reduce food waste by detecting ripeness in fruits?

The food industry has embraced technological innovations in packaging to enhance freshness, reduce waste, and improve consumer experience. Smart packaging technologies are transforming how we purchase, store, and consume food products. This poll tests your knowledge about a groundbreaking smart packaging innovation that has significantly impacted food freshness monitoring in retail environments.

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Ethylene-absorbing QR labels that change color based on fruit ripeness and allow consumers to track optimal consumption time via smartphone
Temperature-sensitive RFID tags that alert store managers when refrigerated products exceed safe temperature thresholds
Oxygen-scavenging film that extends shelf life by creating a modified atmosphere inside the package
Blockchain-integrated barcodes that track product journey from farm to store with real-time freshness updates