Abstract: A port and cap assembly for a solution container is provided. The port includes a tubular wall having a first end and second end, the first end securable to the container and the second end being open and opposite to the first end. An annular flange extends perpendicularly outward from the cylindrical wall between the first end and the second end to define a neck portion of the cylindrical wall. A circumferential sleeve extends longitudinally downward from the annular flange. A radial lip extends generally perpendicularly inward from the sleeve. A resilient cap is also provided which includes a first portion resiliently stretched to cover the open end of the port and a second portion removably captured between the annular flange and the radial lip. The second portion of the cap after being removed from between the annular flange and the radial lip is not recapturable between the annular flange and the radial lip so as to indicate that the port has been uncovered.