Barocook Fuel Pack Set (10-Piece) Note: Do not throw unused heatpacks into the garbage as it leaves them vulnerable to activation caused by disposed liquids Extremely compact and lightweight for portability Two sizes available; Small 20g and Large 50g. The larger size (50g) produces a longer effective cooking time. Water activated heat source reaches up to 203 F Non-Toxic Flameless heat source made of Quick Lime. Eco-Friendly and can be disposed of in a trash bin or bag Cook or reheat your food and coffee/tea anytime, anywhere; at the office, on a road trip, hotels, the great outdoors, or any imaginable situation