This water filter straw can effectively remove the bacteria in the water to provide clean, safe water. It is a lightweight and compact emergency water filter system. Removes waterborne bacteria and parasites, and reduces turbidity. Purify up to 5,000 liters of water, down to 0.01 microns. A soft cap protects the straw-free from dust and stains. Durable ABS material ensures a long service life. It is perfect for an outdoor emergency, camping, hiking, backpacking, etc.