New answers tagged water
Such packets are included in MREs (Meals, Ready-to-Eat) and are referred to as "flameless ration heaters". The packets contain finely powdered magnesium metal, alloyed with a small amount of iron, and table salt. Adding a small amount of water results in a salt-water electrolyte fluid that allows the magnesium and iron to rapidly react and generate heat. ...
Top 50 recent answers are included