Which famous civilian snack food was originally developed as part of a military ration program and marketed with the slogan "Melts in your mouth, not in your hands" specifically for its battlefield utility?

Throughout military history, combat rations have evolved from simple sustenance to sophisticated products with brand recognition and cultural impact. These battlefield necessities have not only fed troops but also introduced innovations in food preservation, packaging, and product design that later influenced civilian consumer goods. Some military rations have even developed cult followings and brand loyalty among veterans and civilians alike. Test your knowledge about these unique products that bridge military necessity and consumer culture!

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M&M's (created for WWII soldiers to have chocolate that wouldn't melt in tropical conditions)
Twinkies (developed for Navy submarines as a dessert with extended shelf life)
GORP/Trail Mix (created as a lightweight, high-energy snack for paratroopers)
Spam (designed as a protein-rich, non-refrigerated meat option for frontline troops)