Described is a device for establishing desired proportions of water and coffee beans. The device includes a fluid vessel and a laterally attached coffee solid vessel. The fluid vessel has vertical height and a fluid volume capacity, with the fluid vessel being formed to hold water therein. The coffee solid vessel has vertical height and an interior that defines a coffee solid volume capacity, with the coffee solid vessel being formed to hold a solid coffee product therein. Importantly, each of the fluid vessel and coffee solid vessel are formed such that a desired solid-to-fluid ratio exists between the fluid volume capacity and the coffee solid volume capacity when laterally attached with one another, with the desired solid-to-fluid ratio being maintained along the vertical height of each of the vessels (which can be readily verified through a visual inspection of the horizontal equality of contents).