Abstract: Drip coffee makers now available cannot brew good quality coffee infusions in a smaller quantity than the nominal capacity for which the coffee maker was designed. This application discloses a selectively utilized filter area limiting device disposed within the brewing chamber of a drip coffee maker with micropore filter which permits brewing an optimum aqueous coffee infusion in lesser quantity than the nominal capacity of the drip coffee maker. This is accomplished by sealing off a portion of the outlet filter and, thus limiting its effective usable area. By limiting the liquid flow through the filter to a pre-selected level, it becomes possible to maintain the total time of flow within the desired limits of an optimum coffee brewing cycle regardless of the number of cups desired.