6 Wilderness Survival Tools That Could Save Your Life

WATER

Even if you’re filtering floodwater with sewage in it, you can make the water crystal clear and safe to drink with this rechargeable, featherweight purifier ($119, rei.com). It’s the only one on the market that kills all levels of microbiological contamination with a simple mechanical pump, and you can use it up to 8,000 times. It's also rechargeable via USB if you have a USB solar charger. (In November 2012, the SteriPen Freedom will come with its own solar charger, as well.)