Turn almost any bottle into a hydration system with the Convertube Water Bottle Adapter Kit from Source. This kit includes a Storm valve with Dirt-Shield and four adapters -- 24mm (fits Evian bottles), 28mm (standard PET plastic bottles), 42mm (Sigg bottles), and 63mm (Nalgene bottles). Easy to use, you'll be able to drink on the move without taking the bottle out of your pack. In addition to a QMT tube, this kit comes with a high-flow Storm valve, a push-pull system that's like drinking from a straw. The QMT valve tip offers the convenience of disconnecting the valve so the tube can be easily woven through tight opening. The drinking tube's Cool Weave cover blocks UV light and insulates, keeping your water cool. It also includes a Dirt-Shield protective cover that protects the valve from valve from dirt, sand, dust, mud, and other pollution. Source has been a groundbreaker in hydration system technology and is also well known for its tactical gear and hiking sandals. Tested in the most extreme conditions, hundreds of thousands of Source hydration systems are in use in the field.