The Katadyn MyBottle Purifier is an ingenious drinking bottle with an integrated virus filter. The MyBottle enables the purification of drinking water at any time and anywhere, no need for pumping. Ideal for small quantities while hiking, traveling or playing sports. A fiberglass pre-filter removes bacteria and protozoa as well as particles larger than 0.3 microns. The new 3-layer filter medium ViruPur blocks viruses and the smallest particles based on electrokinetic depth filtration. The MyBottle doesn't require chemicals or batteries.