Which famous product design innovation was created specifically for American GIs during WWII and later became an iconic civilian retail item?

Throughout military history, product design and merchandising have played fascinating roles in shaping public perception and supporting war efforts. From propaganda posters to military collectibles, the intersection of retail and military history reveals interesting insights about how nations marketed their military might and built public support. Test your knowledge about these unique product design and merchandising strategies that emerged during significant military conflicts.

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The Ray-Ban Aviator sunglasses
The Swiss Army Knife
The Zippo lighter
The Jeep Wrangler