An electrical junction box has a connector retainer assembly with a first contact surface, as well as a connector housing assembly with a pivotal lever arm. A part of the substrate is flexible and bifurcated. The processor is configured to pass system inputs through the model to generate corresponding simulated outputs, and the fault module is configured to determine the fault based on a comparison of the system outputs and the simulated outputs. Movement of the bottle within the elliptically shaped cavity tracks movement of the infant, providing controlled displacement of said bottle in directions corresponding thereto. A fine size particle additive is introduced upstream of a coarse size particle additive.