8014931 Katadyn Vario Backcountry Series Microfilter Water Filter
Product Review (submitted on August 12, 2011):
Use this product while backpacking on the trail. The ceramic disc clogs at about 1 liter so it isn't practical for use. The "faster flow" setting seemed to work great. Filled my 3L bladder faster than my fellow backpackers could fill their 2L.