The K-ration was a United States military ration consisting of three separately boxed meal units: breakfast, dinner, and supper. It was originally intended as an individually packaged daily ration for
Packaging of K-rations used during World War II and the Korean War on display at Fort Devens
United States Marine Corps-issued A-ration, colloquially known as a "bag nasty" or "box nasty". In this case the box held two sandwiches, cereal, fresh fruit, crackers, peanut butter, jam, a muffin, salt, pepper, and a drink.