Which famous consumer product was originally developed for U.S. military use in World War II before becoming a household staple with the marketing slogan 'The little blue can with a thousand uses'?

Throughout history, military conflicts have influenced consumer product marketing in surprising ways. Many companies have aligned their branding with military themes or historical conflicts to promote their products. This poll tests your knowledge of the intersection between military history and commercial product development - where battlefield legacies transformed into marketing opportunities.

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WD-40
Spam
Duct Tape
3-in-One Oil