Stay hydrated anywhere with a palm-sized water filter straw that turns questionable sources into safe drinking water in minutes. Ultra-fine 0.1-micron ultrafiltration delivers up to 2000 liters of clean, drinkable water at a steady 0.6 L/min from natural sources without chemicals. Versatile design lets you drink directly from a water source like a straw, or set up a DIY gravity filtration system with a soda bottle, plastic bag, collapsible bottle, or bucket. Backwashing is a breeze with 28 mm threads—simply screw on a compatible bottle to flush out impurities and extend the membrane’s lifespan. Compact, lightweight build (40 × 136 mm, ~40 g) uses durable ABS and silicone, ideal for camping, hiking, fishing, survival kits, and emergencies; TUV/SGS approved performance.