In Emergency situations, Water is the Key Element of Survival. The Ready Freddy Advanced Water Filtration Bottle is based on technology developed through research by aerospace, medical, and water purification specialists with over 50 years of product development and success! Removes up to 99.99% of chlorine, chemicals, heavy metals, and 99.9999% of bacteria, virus, and radiological activities. Also perfect for outdoor uses like hiking, camping, and travel, where safe drinking water may be at a premium. Provides Great-tasting, fresh water wherever you are.