Self-heating food refers to meals that can be heated without an external heat source, such as a stove or microwave. This is typically achieved through a chemical reaction that generates heat when water is added to a special heating element within the packaging. These meals are convenient for outdoor activities, emergencies, or situations where cooking facilities are unavailable. Commonly found in military rations and camping supplies, self-heating food products often come in pouches or cans. They can include a variety of dishes, such as stews, soups, or cooked rice, providing a warm meal on-the-go.