Thanks to Mountain House's "brick pack" packaging and proprietary barrier film, the LRPs far exceed government requirements. Flavor will be preserved until 2029, and the calories themselves will last long after that. 20 years from now you can cut open your LRP and be greeted by the satisfying hiss of depressurization and the delightful smell of turkey tetrazzini.
te·traz·zi·ni served over pasta with a cream sauce, often flavored with sherry, sprinkled with cheese, and browned in the oven.
And for that brief moment of Italian cheesy bliss, the wasteland of post apocalyptic North America, will be filled with the aroma of Mama Bianchi's kitchen. Just like it was in the old country.