A light emitting device, including a substrate, and multiple drive electrodes formed on the substrate and used to obtain desired light emission, the multiple drive electrode forming a passive-matrix-driven electrode arrangement, wherein at least one drive electrode in a display region of the substrate forms an angle, that is neither parallel nor perpendicular to a given side of the display region. A first imaging portion of the system is used to cause an interaction of an imaging beam with an underlying feature of a region of interest. Several Z-retention features provide surfaces for the EMI shield to lie flat against the inner surface of the bezel, while several X, Y-retention features protrude through holes and notches cut in the EMI shield to further retain the EMI shield. The multiple openings can be used for accommodating multiple drinking straws or for drinking directly from the beverage container. The invention further relates to a set containing at least one such storage unit and at least one carrier for at least one surgical item, in particular for at least one bone screw.