In a survival situation it is tactically recommended to secure the can from a tree or over hang with a static line, gouge a hole in the bottom, and nourish yourself hamster style. It's called baby-birding in some units... In all serious if I'm doing real camping not the borderline glamping-regular camping I normally do, I prefer to bring ramen noodles, jerky, trail mix, and protein powder because it's lightweight and can be eaten however. Or just survive on like two or three meal replacer bars a day. MREs, canned food, and the like are waaaaay too heavy to be lugging around. I like to skimp on food somewhat and pack extra water.