Even though I call this the Water and Food Group, there is no food in my large Personal Survival Kit for two reasons: 1) I usually have some trail mix, energy bars or hard candy with me when I go on a hike or walk, and 2) You can go for days without food, even weeks, but not very long at all without water. The 'food' included in most commercial survival kits is pretty much of a joke anyway, a few sticks of gum or pieces of candy, and the inevitable bullion cube (which takes a lot of water to quench the salty thirst it can induce).

My water collection and treatment kit consists of three one-quart Glad brand Ziploc freezer bags. The freezer bags are tougher than regular Ziploc bags, the closure is secure and doesn't leak (too much, anyway) and they are sized to use with the Potable Aqua tablets, pictured in the small brown glass vial.

Potable Aqua is one of the most widely-used water purification methods in the world, and its iodine-based tablets will kill just about anything in the water that might make you sick. I chose to keep the tablets in their original sealed bottle because iodine is a very reactive substance that will eventually eat through or corrode most common storage containers  (like small plastic vials). If the tablets are left in their original sealed jar, they have an almost indefinite shelf life.

The small sponge is compressed, so it doesn't take up much space. Once it gets wet, though, it expands to be a full-sized hand sponge, which would be very useful for mopping up morning or evening dew from plants, as yet another water source. You can find them in gourmet cooking shops and at dollar stores. It is amazing how much water you can collect this way. It may be labor-intensive, but if it is your only source of water, you don't have much choice.

Not shown here because, ummm, I forgot to include it, is 3 feet of 1/4-inch plastic aquarium tubing that can be used to draw or siphon water from seeps or hard to reach areas, or to get the water out of solar stills or transpiration bags so you don't have to disturb them.