Survival tabs - my ultimate solution for every kit. Whole family loves them (that's a children's dream to eat candy only ).
http://www.amazon.com/Food-Reserves-Survival-Tabs-180/dp/B00JB2VO3A

One of the very well hidden benefits - you can also cut on sanitation supplies after just first day, as it does not produce any waste at all.

Also you can use the container as a watertight flask (there is a zip-lock bag inside allowing to empty the container when in the survival mode).

But hurry, the price is going up, and it looks like these are going to be replaced with the new breed, which new shape I don't like at all - it's ugly and impractical: https://thesurvivaltabs.com/