Which iconic World War II product packaging design was specifically created to boost troop morale and later became one of the most recognizable American consumer products?

Throughout history, military organizations have used sophisticated marketing and propaganda techniques to drive recruitment, boost morale, and gain public support. From ancient battle standards to modern multimedia campaigns, the evolution of military advertising reveals fascinating insights about consumer psychology across different eras. Test your knowledge of how military forces have marketed themselves and their missions throughout history!

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M&M's candy shells (developed to prevent chocolate from melting in soldiers' hands)
Coca-Cola's curved bottle (designed to be gripped easily while in foxholes)
Zippo lighters (created with a windproof design for battlefield use)
Spam canned meat (shaped to fit efficiently in military supply crates)