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Many people refer to these filters as survival filters. I think that is funny. These are water filters and you do not have to be surviving to use them at all. In fact, if you are a fan of backcountry camping or hunting in the backcountry you know that these filters are also great for lightening the load. That is an undeniable fact. When you have access to clean water through these straw type filters it makes a big difference. This is a great look at the many different types of filters available.
The article looks at many different types of filters. I would imagine you probably own one of these already. If not, you are likely considering the purchase of one. Without a way to filter water you are left to the mercy of the tap, which has been a loyal source of water but what happens when the tap goes off?