Abstract: A coffee maker assembly constituted by a decanter for boiling water and a separate container for producing with some of this water a highly-concentrated coffee brew, the container having a cap permeable to liquid and gas. The container is seatable in an inverted position over the decanter whereby steam generated by boiling water penetrates the cap and functions to express the highly-concentrated brew from the container into the water to intermingle therewith to produce a brew of the desired concentration.