Which of these sustainability-focused military product innovations from WWII was widely marketed to civilians as an environmentally friendly alternative after the war ended?

Throughout history, wartime demands have accelerated product development and influenced consumer markets in lasting ways. Many everyday items we take for granted originated as military innovations before being adapted for civilian use. This poll explores how military necessity transformed product development and retail markets during major conflicts, creating sustainability innovations that later became mainstream commercial products.

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Powdered orange juice (Tang was developed to reduce shipping weight and extend shelf life of vitamin C for troops)
Aerosol insect repellent (designed for jungle warfare but marketed as an eco-friendly alternative to widespread DDT spraying)
Synthetic rubber tires (created due to natural rubber shortages and promoted as conserving natural resources)
Aluminum foil (developed for military food preservation but marketed as a reusable alternative to disposable wrapping)