The WaterBasics Series II RED Line Emergency Filter provides is the one size fits all solution for drinking water safety. This powerhouse in a bag comes with everything you need to provide life saving drinking water for you and your family. Designed for versatility, the WaterBasics Series II Emergency Filter connects directly to WaterBasics filter bottles, gravity flow filtration kits, bag to bag filtration kits, emergency pumps and hydration bladders making filter choice easy. Simply match the color for the condition, connect, filter and start to enjoy life saving water. The WaterBasics Series II RED Line Emergency Filter comes complete with a mouthpiece and straw so you can even drink directly from package if the circumstance requires. No other emergency filter does so much straight out of the box. You can depend on WaterBasics.