Which major food retailer pioneered the 'Loop' reusable packaging system that allows customers to return empty containers for cleaning and refilling?

The food industry is rapidly evolving its packaging strategies to meet sustainability goals. Major brands and retailers are experimenting with innovative materials and designs to reduce environmental impact while maintaining food safety and quality. This trivia question explores one of the most significant recent sustainability initiatives in food packaging that's changing how consumers interact with everyday food products.

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Kroger
TerraCycle
Whole Foods
Trader Joe's