Which consumer product became a military icon through its strategic brand positioning during World War II, when the company redirected its entire production to military personnel overseas?

Throughout military history, certain products have gained iconic status due to their strategic brand positioning during wartime. These items transcended their practical use to become symbols of national identity, military prowess, or home front support. This trivia question explores how one particular product's clever marketing strategy transformed it into a cultural phenomenon that remains recognizable decades after the conflict ended.

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Coca-Cola, which built 64 bottling plants near combat zones to deliver the drink to troops at a fixed price of 5 cents
Hershey's Chocolate, which created the D ration bar specifically designed to taste 'just a little better than a boiled potato'
Zippo lighters, which guaranteed their products would 'work or we fix it free' even in harsh battlefield conditions
Ray-Ban aviator sunglasses, which were originally designed for US Army Air Corps pilots and marketed through military imagery