Description: B-QM survival straw for drinking water filter, the world's best Mini (pen size), lightweight and mobile (easy to carry), is a safe self-rescue survival tool for outdoor use. It can purify river water, rainwater, lake surface and other types of water from nature to direct drinking water!! 1. Special Features: Four-stage filtration system The water filter contains no chemicals, no batteries and no moving parts to wear out.2. Quench your thirst quickly: there is a high flow rate on site3. Convenient to use: put it in the water and drink it directly!4. The safest: thally remove bacteria and viruses, can eniminate 99.99%5. Size: 22.5*3CMComs: 【SURVIVAL Drinking Filter STRAW】: Survival-Straw design is ideal for purifying outdoor water such as river, streams, lakes, ponds, valley and other polluted sources. A must for every outdoor traveler!! It can save your life and refresh you back in many unrealized conditions!! 【Give a bite of life-saving water】: does not detract from such small equipment, can save you back to life in a variety of harsh environments! Even for those long journeys, this tool can help you go further and possible to complete the entire journey. Small but Significant!【Thoroughly Purify】Filters up to 1000 liters of polluted water without iodine, chlorine or other chemicals; It requires no batteries and has no moving parts. Unlike