Behold the most versatile water purifier ever dreamt, let alone built! The world's first titanium filter bottle provides unparalleled strength to weight ratio and meets the most challenging rigors of the outdoors. It’s drink-mix ready (hello electrolytes) and the Outer Ti Cup can be used to heat water and cook food near a fire or on a camp stove. The .5L UltraPress® Titanium Water Filter & Purifier Bottle provides complete global protection from virus, protozoa, bacteria, particulates, chemicals, pesticides, herbicides and heavy metals.