LifeStraw Personal Water Filter is an award winning product that designed to remove 99.9999% of waterborne bacteria and protozoan parasites that can contaminate water. It purifies up to 1000 liters of water. This LifeStraw Personal Water Filter is made of durable plastic, compact and lightweight. It requires no batteries, electrical power, or replacement parts. Awesome stuff to buy that makes dirty water clean and lets you drink directly from lakes, and streams. It is perfect for traveler, camper, hiker, backpacker or for emergencies.