SteriPen Sidewinder Water Purifier Hand powered UV Water purification system For water supply emergencies Battery free Disinfects 8000 liters Germicidal UV light destroys waterborne bacteria, protozoa and viruses Easy to use Hand-powered, battery and chemical-free ultraviolet water purification system Comes with Tritan BPA-free water bottle and a SteriPen Pre-Filter for particulate removal Effectively destroys waterborne microbes from one-liter of water in 90 seconds without chemicals; provides 8,000 treatments Designed for use with your left or right hand: fill it--crank it--drink it Recipient of the Water Quality Association (WQA) Gold Seal, certifying that SteriPen purifies water safely and effectively