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GRAYL: A Cup That Filters Water on the Go

Calling all hikers and international travelers! If you often find yourself in places where you don’t have easy access to safe drinking water — such as developing countries or remote hiking trails — you may be interested in a new product called the GRAYL.

This attractive, stainless steel water filtration cup works almost like a French press. You fill up an outer mug with water, then push a slightly narrower cup (equipped with a filter) into the outer mug, which forces the liquid through the filter and removes bacteria and other impurities that can make the water unsafe to drink. Check out the video below for a demonstration.

The GRAYL, which sells for $69.95, comes with a filter that removes 99.99 percent of bacteria and 99.94 percent of protozoan cysts, as well as metals and chemicals such as chlorine, BPA and lead. The filter is good for about 300 uses and can be replaced for $19.95 (or $49.95 for three).

While the normal filter is sufficient for travel within the United States or to most other developed countries, international travelers or backcountry hikers will probably want to upgrade to the Purifier, which costs $39.95. Beyond everything the standard filter removes, the Purifier takes care of 99.999 percent of viruses, bacteria and protozoa.

If there’s one downside to the GRAYL (aside from the cost), it’s the weight. It comes in at 19.6 ounces before you even fill it with water, making it a heavy addition to your daypack — but it sure beats carrying multiple disposable water bottles.

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