MRE=s in a trunk isn't the best ides during the warmer months if you check the shelf life charts on them. I rather like Mainstay, but then I also like Mre's. Millenium bars have fared well with the field testers fpr my site, which still under construction. I think I might get it up and sort of running sometime in the next fifty years. Not a computer savvy person. The milleniums are advertised with a five year life and store under extreme conditions. Also there are survival tabs. And jerky. The real, homemade jerky, not the greasy commercial stuff. Dried fruit, granola bars, etc. Hop this helps.