By Gary Benton
To make a water filter, simply make a tripod, tied at the top, and using undershirts or bandanas make three collection points on the tripod. In top collection point, place grass and very small twigs to catch the debris that may be in your water. This point will collect most of the larger particles in your water sources. The as the water drips into collection point 2, the sand will filter out even smaller debris that you cannot even see with the naked eye. Finally, the charcoal, or point 3, will act as a very fine particle cleaner and the water collected in your water contain will look clean and drinkable, but it is not.
While filtered water will be clean of debris, you will still need to purify it. You can purify your water with bleach, unscented, or by boiling. Water purification tablets may be used, but they'll not kill all bacteria and that makes you likely to get ill, so boil your water unless you have bleach.
Gather water from fast moving streams, not ponds or lakes where the water is discolored or has an smell. You want the cleanest water you can find to start with and it'll be cleaner once it runs through the three collection points. This stand can also be used to melt snow, if you place it close enough to your fire, not to close, but close enough the heat can be felt. Ice is better than snow, but takes much longer to melt using a tripod.