Mres 2023 inspection date. The mre is a totally self-contained operational ration consisting of a full meal packed in a flexible meal bag. The full bag is lightweight. Each meal bag contains an entrée and a variety of other components as may be seen in the table of menus. Menu variety box a or box b. 12 different meals with average 1250 calories per meal. No refrigeration required, waterproof packaging. Includes flameless heaters and accessory pack in each meal.