The ornamental design for a sinkdividertop, substantially as shown and described.
FIG. 1 is a right front perspective elevational view showing my new design with the dashed lines showing the environment for the sink divider top, forming no part of the design, shown partially broken away to illustrate that the height of the environment is immaterial to the subject invention;
FIG. 2 is a front elevational view thereof, the rear elevational view being the mirror image;
FIG. 3 is a right side elevational view thereof, the left side elevational view being the mirror image;
FIG. 4 is a top plan view thereof;
FIG. 5 is a right front elevational perspective view of FIG. 1 with the divider shown in a possible position within the environment of a sink, also shown in dashed lines; and,
FIG. 6 is similar to FIG. 5 showing the divider in an alternate environment.