standard P-38 can opener instead of the "twist key". Menu Breakfast Unit: canned entrée veal (early version), canned chopped ham and eggs (all subsequent versions), biscuits, dextrose or malted milk tablets (early version), dried fruit bar, pre-mixed oatmeal cereal (late version), halazone water purification tablets, a four-pack of cigarettes, Dentyne or Wrigley chewing gum, instant coffee, a packet of toilet paper tissues, and sugar (granulated, cubed, or compressed). Dinner Unit: canned entrée pork luncheon meat (early version), canned processed American cheese, Swiss and American cheese, or bacon and cheese (cheese entrée all subsequent versions), biscuits, 15 dextrose or malted milk (diastatic malt) tablets (early) or five caramels (late), sugar (granulated, cubed, or compressed), salt packet, a four-pack of cigarettes and a matchbook, chewing gum, and a powdered beverage packet (lemon (c. 1940), orange (c. 1943), or grape (c. 1945) flavor). Supper Unit: canned meat, consisting of cervelat sausage (early version), either pork luncheon meat with carrot or apple (first issue), beef and pork loaf (second issue); biscuits; a 2-ounce (57 g) D ration emergency chocolate bar (early version), Tropical bar, or (in temperate climates) commercial sweet chocolate bar (late version), a packet of toilet paper tissues; a four-pack of cigarettes, chewing gum, and a bouillon packet (cube or powder). In total three meals provided of food energy and 79 grams of protein, depending upon components. As it was originally intended as an "assault" ration to be issued for short durations, the K-ration was designed to be used for a maximum of 15 meals. The K-ration was mass-produced by several major U.S. food production companies, including H. J. Heinz, Patten Food Products Company and The Cracker Jack Company. K-ration crates were either wood ( each) or fiberboard ( each) and had a volume of . Each crate contained 12 daily rations (each daily ration consisting of one Breakfast unit, one Dinner unit, and one Supper unit) for a total of 36 units per crate. They were packed one unit deep, three units wide (one of each unit), and twelve units long (all of the same unit type). The U.S. Army M1943 uniform had simplified, but large, pockets that were designed to hold a K-ration box. See also 5-in-1 ration 10-in-1 food parcel C-ration Jungle ration Mountain ration United States military chocolate (D ration) Unitized Group Ration References Further reading Arnold, Bruce Makoto. Your Money Ain't No Good O'er There': Food as