Product details:

When disconnected from a reliable source of clean water, the LifeSaver 4000UF Bottle allows you to use water from natural sources such as ponds, lakes and rivers, to stay hydrated, whilst protecting you from waterborne viruses, bacteria or cysts. From camping to traveling, to emergency preparation, you can survive and thrive in the toughest of environments with the LifeSaver 4000UF Bottle. The replaceable cartridge can filter up to 4,000 liters of water!