Secondary dispensing system for a rigid container of a flowable substance

A secondary dispensing system for a rigid container of a flowable substance for improved dispensing capability, the secondary dispensing system comprises:

• a flanged aperture located along an outer perimeter of a base of the rigid container;
• a surface panel that defines a base segment and a wingwall, the base segment is configured to rest on an external surface of the base of the rigid container, the wingwall is configured to rest on an external surface of a sidewall of the rigid container;
• a hinge that secures the surface panel to the external surface of the sidewall of the rigid container and enables its articulated rotational movement;
• and
• a headed pin that defines a shaft and a head, the shaft is configured to insert into and seal the flanged aperture, the head is fixedly attached to the base segment of the surface panel, wherein the secondary dispensing system defines an open position and a closed position through the articulated rotational movement of the surface panel, wherein the headed pin is removed from the flanged aperture in the open position of the secondary dispensing system, enabling gravity-based dispensing of the totality of the residual flowable substance from the rigid container without requiring tapering of any of its internal surfaces, and wherein the headed pin is inserted into the flanged aperture in the closed position of the secondary dispensing system, effectively sealing the flanged aperture and retaining the flowable substance inside the rigid container without leaks, wherein the secondary dispensing system is configured to integrate with the rigid container without materially modifying its design, and wherein the flowable substance is either a liquid, gel, mixture, or granular material.