The ornamental design for a coolerdevice for personal watercrafts, as shown and described.
FIG. 1 is a top, front perspective view of a cooler device for personal watercrafts showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view thereof;
FIG. 4 is a left side elevational view thereof; the right side elevational view being an identical mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof;
FIG. 7 is a bottom, rear perspective view thereof; and,
FIG. 8 is a right side elevational view thereof.
The broken lines in FIGS. 1, 7, and 8 showing environmental structure of the cooler device for personal watercrafts are for the purpose of illustrating environment, and form no part of the claimed design.