Purisoo is a reusable, portable, premium-design purification water bottle that protects you and your family from consuming contaminated water while outdoor trekking, traveling, and during disasters. With manual pumping, almost any water source can be purified and filtered into clean, safe drinking water. Just place the bottom of the bottle into any water resource. The pump draws dirty water through the filter, filling the bottle only with clean, drinkable water. Contaminated water is never stored in the bottle. Purisoo uses triple layer filtration to provide the most effective portable purification. Hollow-fiber membrane removes anything larger than 0.2μm. That is 99.9999% of disease-causing bacteria such as salmonella, cholera and E.coli; also removes 99.9999% of all protozoans like Giardia and Cryptosporidium. Active Carbon Fiber reduces viruses (e.g., Hepatitis A, SARS, Rotavirus) and heavy metals; also eliminates bad odors and taste such as Chlorine.