The Soylents of the Lambs
Durable, long-lived, dehydrated full-meal replacement products have a significant place in the future of human life on this planet as war and global climate change produce huge migrations and displacements. The problem of potable water is hard enough, and will become more challenging as wet regions dry out or become arid for parts of a year. But it's possible to sanitize water for drinking and convert sea water to fresh. It's a technological challenge, but it's not physically impossible, and some parts of it have been solved.
Getting sufficient quantities of food to the right places on the globe at the right time that is pest-resistant, stable, nutritious, and not foul is vastly harder. While there are many variants in the world today, most relief projects and ongoing aid to refugee camps involves food components, like beans, often requiring some preparation, and which may be deficient for a minimal healthy