The BeFree 1.0L is a great choice for supplying camp drinking water. It is superlight to fill. This filter removes bacteria, cysts and sediment with its pore size of 0.1 micron (0.0001 mm). Compact and ultralight hollow fiber filter that only weighs 63g. The collapsible flask packs small to fit into tight spaces such as running shorts, cycling jerseys, paddling or fishing vest. The output is up to 2L/min., and the capacity is up to 1000L, depending on the quality of the water. Easily clean the EZ-Clean MembraneTM by simply shaking or swishing the filter in the water - in the field or at home. No back-flushing or tools necessary. 100% PVC and BPA free. Capacity (L) up to 1000 L Output ~ 2 quart/min Technology Hollow fiber filter 0.1 micron Weight 2 oz Volume 1.0 L Dimensions 10 x 3 x 3 inches