Katadyn is a Swiss company and the global Number One when it comes to individualized water purification systems and products. They have been developing water filters, chlorine- and silver-based sterilization agents and mobile desalinators for travel, outdoor, camping and marine applications since 1928. Numerous armed forces and relief organisations around the world use our products for survival and life-saving. MyBottle Purifier is the only EPA registered bottle purification system available. Simply fill the bottle with water, insert the purification system and drink from virtually any water source. It removes all viruses, bacteria, cysts from water plus the integral carbon cartridge reduces chemicals and makes water taste better. As always, each MyBottle includes a drinking straw to use as your everyday bottle if the source water is already safe to drink.