A: Blue plastic funnel with B: cap used to hold filter paper. Funnel is designed to fit on two 2-liter soda bottles (with cap on) or on the top of a jerrycan (without cap).

In 2016 Dr. Theresa Dankovish's company, Folia Water, developed the Tasita, a filter holder that "fits with a variety of household water collection and storage containers around the world, including 2-liter bottles." The invention is intended to be a low cost measure to provide quality drinking water in areas where sources of drinking water are contaminated.