This water purification straw is a high-performance portable water purifier that purifies sewage into drinking water with super purification performance! It effectively removes all E. coli and parasites that cause common diarrheal diseases. No need for electricity and spare parts, you can take it with you for safe and clean water. Using the new "Ultrafiltration Membrane Technology", the water purification efficiency is significantly improved, and no chemical medium is used to purify the water, so there will be no problems or side effects. Water purification straws can not only provide safe and clean drinking water for victims of earthquakes, tsunamis, hurricanes or other disasters, but also become a standing "self-defense weapon" for people traveling outdoors. It can be used to directly filter any surface dirty water (referring to water sources without any pollution and fresh water sources). It can filter 97.% of parasites, microorganisms and Escherichia coli in water, effectively preventing the occurrence of infectious diseases such as dysentery. Product Features: 1. Provide convenient, safe and clean outdoor drinking water 2. Superior water purification capacity: at least 1000 liters of water can be filtered under normal conditions 3. At least 99.86% removal of E. coli 4. At least 99.9% removal of aquatic parasitic protozoa 5. Reduce turbidity: filter out about 0.2 micron particles 6. Pure physical purification 7. High water flow 8. No need for electricity/battery, or replacement parts Product life and efficacy: The water purification straw achieves a water purification capacity of 1500 liters (1.6 times the design life) under laboratory conditions (more stringent than the EPA requirements for turbidity and organic matter) Average Traffic 280ml/min when starting 280 ml/min, between 10 and 200 liters 250 ml/min, between 200 and 500 liters 170 ml/min, between 500 and 1000 liters 200 ml/min, average flow between 0 and 1000 liters Turbidity: Under laboratory conditions, turbidity was reduced by an average of 99.6%. Inflow water turbidity: 104 NTU Outflow Turbidity: 0.4 NTU