Your Ultralight Purifier Bottle may last 300 times before it stops filtering pathogens and particulates, but you don't know how many times you'll use it on your longer travels, so be sure to have Grayl's spare Purifier Cartridge packed. This cartridge has a shelf life of ten years, just in case you don't end up using it on your next trip.
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Grayl Purifier Cartridge
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Rising above a scene rich with extraordinary wildlife, pristine lakes, and alpine terrain, the Teton Range stands monument to the people who fought to protect it. These are mountains of the imagination. Mountains that led to the creation of Grand Teton National Park where you can explore over two hundred miles of trails, float the Snake River or enjoy the serenity of this remarkable place.
The pika is a close relative of the rabbits and hares, with two upper incisors on each side of the jaw, one behind the other. Being rock-gray in color, pikas are seldom seen until their shrill, metallic call reveals their presence.