The Sawyer Mini Water Filtration System is perfect for those who enjoy outdoor activities such as biking, parties, or simply exploring the town. No additional water treatment tablets or external power supply are needed for this compact and lightweight filter. It can effectively clean up to 375,000 litres of water of bacteria and protozoa (99.99999%) and 100% micropolymers. The system is also reinforced for long-lasting use. The package includes a filter, a 16 oz water bag, a drinking tube, and a cleaning syringe. With its lightweight and durable construction, built-in 28mm thread, and high filtration capabilities, this system is a must-have for any outdoor enthusiast. Plus, it is easy to operate, clean, and mount on a PET bottle with its microfibre filtration measuring less than 0.1 microns in diameter.