If you are planning to spend some time away from civilization, it is a good idea to prepare for such a stay. This means not only choosing optimal equipment, but also sufficient supplies of durable food and water. Among the most well-known non-perishable foods are MREs (meal, ready-to-eat), which are standard in the US military. It is essentially a package of canned food that is equipped with a flameless warmer (warming capsule).
Military food packs (combat rations) from the Polish manufacturer Arpol operate on the same principle, with several menus and pack sizes to choose from. Armed also offers a range of MRE meals from the Czech manufacturer Adventure Menu. This producer offers hearty portions of long-lasting food cooked in traditional ways and from quality ingredients, which will surprise you with their excellent taste even in the middle of the wilderness.