The ornamental design for an icecubetraydesign, as shown and described.
FIG. 1 is a perspective view of an ice cube tray design showing my design;
FIG. 2 is a front view thereof, the rear view is a mirror image thereto;
FIG. 3 is a right-side view thereof, the left-side view is a mirror image thereto; and,
FIG. 4 is a top view thereof, the bottom view is a mirror image thereto.
The broken line showing of an ice cube tray outer wall in FIGS. 1-4 is for the purpose of illustrating environmental structure and forms no part of the claimed design.