... for soldiers, hiking, camping, fishing, hunting, climbing, trip/ travel, out-door work, survival, emergency and also refugee and rescuer in earthquake ... : Patent No. ZL200510033632.9Patent No. ZL200610034167.5Patent No. ZL200620063423.9 Test report: http://www.pureeasy.com/Download/report_soldier_water_filter_pearl_river.pdfhttp://www.pureeasy.com ...