Which of these famous food products was originally developed for military use during WWII and later became a civilian retail success through strategic brand positioning?

Throughout history, military needs have driven innovation in food preservation and packaging, creating products that eventually became household names. Some of these military-developed products later transformed into civilian market successes through clever brand positioning and marketing. Test your knowledge about famous products that originated from military rations and later became commercial retail successes.

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M&M's (Mars candies coated in hard shells to prevent melting in tropical climates for soldiers)
Coca-Cola (Created as a battlefield stimulant with higher caffeine content)
Heinz Ketchup (Developed as a preservative-heavy condiment for Navy ships)
Kellogg's Corn Flakes (Invented as a lightweight, nutritious breakfast for infantry troops)