Which of these common consumer products was NOT originally developed for military use during World War II?

Many everyday consumer products we take for granted were originally developed for military applications before finding their way into civilian markets. These military-to-consumer product transitions represent some of the most successful examples of technology transfer in modern history. Test your knowledge about these wartime innovations that transformed civilian life and created entirely new consumer product categories.

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Jeep vehicles
Tupperware food containers
Aerosol spray cans
Duct tape