We may earn revenue from the products available on this page and participate in affiliate programs. Learn More › Gravity water filters are standalone water purification systems that use gravity to ...

In gravity filter mode, standard water bottle mouths are connected only with a “press-fit,” as opposed to threading, which we felt was not sufficiently secure during filtering—although you can screw ...

Wind raked waves off the mountain lake. I stooped to scoop water for dinner from the shore, 6 liters filled the filter reservoir bag. In less than five minutes the water would be filtered and potable.