Self-heating food packaging is active packaging with the ability to heat food contents without external heat sources or power, usually using an exothermic chemical reaction. Packets can also be self-c
A Unitized Group Ration – Express self-heating field ration being heated in its box
Self-heating rice with quicklime and water as heating source, taken before adding water to quicklime
WW2 era Heinz/ICI self heating soup can
The Unitized Group Ration is a United States military ration used by the United States Armed Forces and Department of Defense. It is intended to sustain groups of American service members with access
A Marine holding two UGR-H&S rations
An Air Force airman placing UGR-H&S rations in an immersion heater
A Marine looking through UGR-A boxes in a freezer
Marines serving UGR-Ms during a family career awareness event