Which packaging innovation of the 1910s-1920s is credited with shifting retail power from shopkeepers to manufacturers and creating modern brand loyalty?

In the annals of retail history, certain innovations transformed how products reached consumers. This trivia question explores a pivotal packaging innovation from the early 20th century that revolutionized consumer relationships with products and dramatically altered retail strategies. This innovation created brand loyalty, standardized product quality, and shifted purchasing power dynamics. Test your knowledge of this transformative moment in retail history!

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Branded, sealed packaging replacing bulk bins
Introduction of refrigerated display cases
Invention of the shopping basket
Implementation of store window displays