QUANJI PressStraw personal water filters are free of chemicals, batteries and moving parts that wear out. It features high flow rates and weighs only 80 grams. The ultimate survival tool for hiking, camping, ultralight backpacking, hunting, travel, reconnaissance and emergency preparedness, its straw design is perfect for purifying water from streams, lakes, ponds and other sources of pollution.This filter element is an ultrafiltration membrane, and the plastic used is ABS food-grade plastic, which is more secure to use. Another feature is that it can pressurize, pump water, such as from a river into a bottle, and filter at the same time, which is an important thing to collect water outdoors.In addition, the filter element can be replaced and cleaned, so it can be reused, which is more environmentally friendly and economical, and there is no need to repeatedly purchase new products.We all need to prepare one, whether it is natural disasters such as earthquakes and typhoons, or our outdoor sports, tourism, camping, etc., we can use water in emergency situations.