Which of these common consumer products was originally developed as part of a military project during WWII, then successfully marketed to civilians after the war?

Throughout military history, many products initially developed for wartime purposes found their way into civilian markets, transforming industries and everyday life. These innovations often began as solutions to battlefield challenges before companies repurposed and marketed them for consumer use. This poll tests your knowledge about famous products that originated in military research and development before becoming household names through strategic marketing and product innovation.

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Duct tape, created by Johnson & Johnson for the US military to keep ammunition cases sealed from moisture before being marketed to the construction industry
Bubble wrap, developed by the US Army as protective material for gun barrels before being repurposed by Sealed Air Corporation as packaging material
Post-it Notes, created by 3M for the US Navy as waterproof message boards before being marketed as office supplies
WD-40, formulated by the British military as a rust prevention solution for tank parts before being commercialized for household use