Abstract: A combination for purifying a liquid, such as used cooking oil, unrefined edible oil, biodiesel fuel, rendered fat, or dielectric fluids comprising a container comprising a holding portion having at least one wall portion and at least one portion that is designed to fail structurally upon heating of the liquid, such as at least one cap portion, which is connected detachably to the holding portion. The combination also comprises at least one purifying material, such as an adsorbent powder, contained in the holding portion of the container. Upon contact of the container with the liquid and heating of the liquid, at least one of the at least one portion(s) that is designed to fail structurally provides at least one opening in the container, whereby the liquid is contacted by the at least one purifying material, and the liquid is purified.

Abstract: A composition for purifying a liquid, such as used cooking oil, unrefined edible oils, or biodiesel fuel, that comprises at least one purifying material, such as magnesium silicate, and at least one binder material that is a solid or a semi-solid at room temperature, or is water or a glycol. When the composition is placed in a liquid, and the liquid is heated, the solid composition disintegrates and the at least one purifying material is released in the liquid. Such composition minimizes or eliminates contact with the dust associated with solid adsorbent materials, and provides for a controlled release of the at least one purifying material into the liquid to be purified.