Personal Camping Purification Water Filters Survival Straw Kits Emergency Supplies Portable Outdoor Water Filter Filtration System Hiking AccessoriesFeature:1. Provide convenient, safe and clean outdoor drinking water.2. Excellent water purification performance: under normal conditions, it can filter at least 3000 liters of water.3. Remove at least 99.9999% of water dust.4. At least 99.9% removal of parasitic aquatic protozoa.5. Reduce turbidity: it can filter particles of about 0.2 microns.6. It does not contain chemicals.7. The water flow is large (the flow of height 60cm is more than 300ML per minute).8. There is no need for electricity/battery or spare parts (back to flush). Product Life and Feature: It can purify 3000L of water, and the straw will not be blocked at the end of its life. Life cycle 3-5 years after first use (after use, it should be cleaned and stored as needed. Unopened products can be stored for a long time without deterioration and will not affect the use.)Medium Movement: For gravity filtration, the height of the water head is 60cm, and the flow rate is 250-300ml in 1 minute. Instructions:Absorb water with your mouth or water siphon with a silicone hose (gravity filtration). After use, drain or shake the water and put it in the box. Precautions:1. Please spit out the first saliva.2. Filter water does not collect salt water and chemically contaminated in the