The ornamental design for an icetraysystem, as shown and described.
FIG. 1 is a perspective view of an ice tray system showing my new design, wherein the area on the top surface is for display of a transparent ice appearance thereof;
FIG. 2 is a front view thereof;
FIG. 3 is a back view thereof;
FIG. 4 is a side view (opposite side view is mirror image) thereof;
FIG. 5 is a top view showing the top surface, wherein the top surface section being a transparent ice appearance thereof;
FIG. 6 is a bottom view thereof, wherein the length is demarcated by the parallel lines; and,
FIG. 7 is a bottom perspective view, wherein the contour of the bottom surface is uniform throughout the length of the bottom surface.