Designed for the urban travelers and outdoor adventurers. By using the Alter Ego Water Filtration Bottle, you’ll be able to meet up to your hydration needs even in developing countries where access to clean water is often limited. This bottle comes with the Globetrotter Filter which can remove 99.9999% contaminants and can last for 75 gallons of filter water at a time. The Outdoor Filter on the other hand can last for 200 gallons approximately. When the filter reaches the end of its life, it can be replaced easily. So grab water from rivers, lakes and tap water as you travel around the world but always make sure you drink from this amazing bottle with an even amazing filter made from Eastman Tritan Co-Polymer, PP#5 and Food Grade Silicone.