Container with constrained quality maintenance agent

摘要

A container (3,53,63) having a quality maintenance additive (31,41,45,59,65) which maintains the quality of a quantity of liquid (11,11',11'') or other flowable substance held in the container. The quality maintenance additive is associated with the container so that the quality maintenance additive remains with the container when the liquid or other flowable substance is emptied from the container.