Abstract: A modular container system includes a support surface. A first wall and second wall are attached to the support surface and project outward at an acute angle from the support surface. A container module includes a compartment. A third wall and fourth wall are project inward at an acute angle from the exterior surface of the container module. The third wall and the fourth wall are arranged in a dovetail joint relationship with the first wall and second wall. In another embodiment a plurality of wall projections project out from the sidewalls at an acute angle. A removable container module includes angled sides. The angled sides are configured to slide down in between two separate instances of wall projections.