Which of these innovative military products was specifically designed with a color-coded packaging system to ensure proper battlefield deployment sequence?

During World War II, military product development accelerated dramatically, creating innovations we still use today. One particular product design revolutionized modern combat operations through its innovative packaging and delivery system. This trivia question explores how product design in military history has shaped both warfare and everyday civilian life. Test your knowledge of this significant military innovation that exemplifies how necessity drives invention during wartime.

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M1 Garand rifle clips
The colored smoke grenades of the Vietnam War
The D-Day DUKW amphibious vehicles
The Normandy invasion's BIGOT security maps