In which decade did Coca-Cola introduce its now-iconic plastic contour bottle (keeping the glass bottle's distinctive shape but in PET plastic), revolutionizing its packaging strategy?

The most recognizable product packaging designs become cultural touchstones that transcend their original purpose. One of the most successful packaging designs in history has been the Coca-Cola contour bottle, which has undergone several strategic transformations while maintaining its iconic status. This trivia question explores a pivotal moment in the evolution of this brand's packaging design strategy that had significant market impact.

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1970s
1980s
1990s
2000s