The Circle of Life
Spoiler: REUSABLE FOOD IS PEOPLE.
In this world of ecological responsibility, it was only a matter of time before we reached the point of reusing and recycling actual food. And so it only makes sense that we'd need pouches for holding said reusable food.
If you really think about it, the idea of reusable food is not all that new. One animal eats a plant and then is eaten by another animal. That animal then excretes the previous plant-eating animal and we then use the excreted plant-eating animal as fertilizer to grow our food, which we then consume and excrete and so on and so forth until something comes along and eats ...
What's that? Oh. Oh I see. Oh dear. As it turns out, the pouches THEMSELVES are reusable, NOT the food you put IN the pouches. In fact, it seems that the Department of Health and Safety advises AGAINST reusing old food. Well then. I guess that IS a novel idea, after all.