Which 1960s packaging innovation was initially rejected by consumers as 'unnatural' but went on to revolutionize food preservation and retail distribution?

The history of product packaging reveals fascinating insights into cultural values, technological innovation, and consumer behavior throughout the ages. From ancient clay vessels to today's smart packaging, the evolution of how products have been contained and presented tells us as much about society as it does about commerce. Test your knowledge about a revolutionary packaging innovation that transformed retail and consumer behavior in the 20th century!

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The aluminum beverage can with pull-tab opening
Vacuum-sealed packaging for coffee
Tetra Pak aseptic cartons for milk and juice
Aerosol spray cans for whipped cream