Soldiers, urine for a treat! 
According to an article in the New Scientist, food scientists working for the US military have developed a dried food ration that troops can hydrate by adding the filthiest of muddy swamp water or even peeing on it.  This is a huge advancement in technology, will reduce the amount of water soldiers need to carry, and increase the length of time soldiers are able to spend in the field. It's also gross.

Advancements by the Hydration Technology of Albany, Oregon allow a hungry soldier to pour dirty water into one end of a foil sachet containing two inner pouches separated by a membrane. The water seeps through the membrane into the dehydrated food on the other side. As it dissolves large molecules in the food, it creates a very high concentration solution. The osmotic pressure created then draws more water through the membrane.
Ed Beaudry, an engineer with HTI, warns that "rehydrating food this way in the long term would cause kidney damage." Oh yeah, and nausea knowing you're eating your bodies waste.

I admit, I've taken MRE's on camping trips, and I have indulged in freeze-dried space food. It's the novelty, eating the same fully hydrated,  ready to eat, freeze-dried powders and semi-liquids enjoyed by astronauts and cosmonauts seems swell the first six or seven times...
However, no matter how hungry I get, I won't be peeing on my food anytime soon.


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