The only EPA-registered water purifier bottle on the market. The Katadyn MyBottle is one of the top portable water filters available. It supplies 7 fluid ounces of drinking water in a minute and is sufficient for up to 100 liters. The lightweight MyBottle Purifier weighs a mere 8 ounces, and because it is made of food-grade polyethylene, it also has a neutral taste. Its large opening enables it to be easily cleaned by hand or in a dishwasher. The three-stage water filter is the heart of this perfect outdoor drinking system. It eliminates harmful viruses, bacteria and protozoa. And it improves the taste of the water. No more of that swampy taste of decayed water in your mouth but the living freshness of spring water! BPA free. Cyst filter: replacement for the middle stage of the purifier cartridge.