Whether you spend a lot of time camping, or just want to be prepared for various apocalyptic scenarios, the LifeStraw Family 1.0 can purify nearly 5,000 gallons of water in its lifetime with no electricity, iodine, chlorine, or other chemicals. That’s enough water to last a family of four for three years. [LifeStraw Family 1.0 Water Purifier, $58]

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