Getting stuck outdoors without clean water is not fun. The Katadyn Hiker Pro Water Filter can help. It gets rid of bacteria and protozoan cysts down to 0.2 micron. Its activated carbon filter improves the tastes in your water. The Katadyn Hiker Pro has a transparent design, so you can see the process.
This micro filter has a compact design, weighing 11 ounces, so you can easily carry it in your backpack.