The ornamental design for a portablecpapsanitizer, as shown and described.
FIG. 1 is a perspective view of a portable CPAP sanitizer showing my new design;
FIG. 2 is another perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a left side elevational view thereof;
FIG. 6 is a right side elevational view thereof;
FIG. 7 is a top plan view thereof;
FIG. 8 is a bottom plan view thereof; and,
FIG. 9 is a perspective view thereof in a condition of use.
The broken line showing of a tube in FIG. 9 represents an environment and is for illustrative purposes only. The remaining broken lines show portions of the portable CPAP sanitizer that form no part of the claimed design.