Katadyns Vario Water Microfilter is specifically designed for easy purification of water wherever you happened to be. The Vario incorporates three levels of filtration for purification a ceramic prefilter that can be adjusted to compensate for any cloudiness inthe water, active charcoal to eliminate any odors or foul taste, and a high performance fiberglass cartridge style filter. The Katadyn Vario is far more advanced than any water bottle equipped with a filter- its arguably the best water purifier out there in this price range. Purifies up to two liters of drinking water per minute, and compatible with  most commercial water bottles and hydration bladders