I wanted to share my favorite gear item to treat stream water, so it’s safe to drink. Meet the Grayl Geopress!
I’ve used the Geopress now for several years, including on the Kalalau Trail. According to the manufacturer, it removes viruses, bacteria (including leptospira), and protozoan cysts, as well as some heavy metals and many chemicals.
It is also quick and easy to use: Fill the outer container with water, use your body weight to push down on the filter, and after only a few seconds, you have 24 ounces (0.71 l) of clean drinking water. No hoses to unravel or store and no pumping.
The Geopress has been great for getting water replenished when crossing streams without wasting a lot of time. It stores easily in the outer pocket of my backpack (you can also clip it on). It’s also quite rugged and can easily survive being dropped.
You can even drink directly from the built-in spout or leave the filtered water in it for storage. (I use the Geopress plus two 1-liter lightweight Nalgene bottles to manage all my water.)
(Full disclosure: since I’m a little OCD, I usually also use a Steripen Adventurerto treat the water with UV light, which technically is not required.)
Does the Geopress have any downsides? It is on the heavier side, but the speed and convenience make it worth it for me.
Reference: Manufacturer’s info
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