MSR Trailshot

Clean water for almost no weight!  This pocket-sized filter lets you drink directly from the source, or fill up your bottle.  You can operate it with one hand and it will filter a litre of water in one minute.  To clean, just give it a shake and the flow rate will be restored.  The Trailshot is great for trail runners, mountain bikers, and anyone wanting to shave weight.

Effective against:  protozoa, bacteria, particulate 
Weight: 142 g 
Filter matrix and pore size: hollow fiber, 0.2 microns 
Flow (L/min):  1
Cartridge life (L):  2000