The LifeStraw Personal Water Filter is nothing short of impressive; it’s already received an award for the best invention of the year, and someday it might save you from dehydration. Would Bear Grylls approve, we’d like to think so. It’s the perfect bit of gear to take with you next time you go hiking, camping or out into the wilderness on your next adventure. At just 2 ounces in size, you’ll be able to filter a remarkable 264 gallons of water while still removing and eliminating a minimum of 99.99999% of water-born bacteria and 99.9% of parasites. And the best features about the Life Straw is that it’s entirely self sufficient, there’s no requirement for chemicals, no batteries to replace, and no moving parts that will wear out.