Which sustainable packaging innovation was initially met with consumer resistance but eventually led to a 70% reduction in plastic waste for its industry?

Throughout retail history, packaging innovations have significantly impacted sustainability efforts. Some breakthrough developments have completely transformed how products reach consumers while reducing environmental impact. This trivia question challenges you to identify a major sustainable packaging innovation that revolutionized an entire industry and changed consumer expectations about product delivery. Test your knowledge of retail sustainability milestones!

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Heinz's first-of-its-kind plantable ketchup bottle made from tomato plant byproducts (2013)
The Coca-Cola PlantBottle technology that replaced petroleum-based components with plant materials (2009)
Lush Cosmetics' invention of solid shampoo bars that eliminated plastic bottles entirely (1995)
Amazon's frustration-free packaging program that reduced excessive packaging materials (2008)