Lifestraw's Family 1. 0 Water Filter will pull bacteria, viruses, protozoa, and sediment out of 18,000L of water, which is enough to provide clean water to a family of five for up to three years. This sort of filter life means you can use it when you're car camping until Armageddon finally hits, or keep it stashed away at home in case of an emergency. It's simple to use, with a gravity powered filter that can move through 12L in an hour, and a backwashing bulb that makes it easy to flush out the hollow fiber filter for faster performance and a longer life. There's also a pre filter that screens larger debris to prevent the small filter from getting clogged, and a convenient nozzle that allows you to set the Family up and forget about it until it's time to drink.