Optical cup

FIG. 1 is a top plan view of the optical cup;

FIG. 2 is a bottom plan view thereof;

FIG. 3 is a left side elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a front elevational view thereof;

FIG. 6 is a rear elevational view thereof; and,

FIG. 7 is a top perspective view thereof.

The features shown in phantom do not form a part of the claimed design.

The broken lines that define the bounds of the claimed design form no part thereof.