The ornamental design for a cartomizer, as shown and described.
FIG. 1 is a front perspective view of a cartomizer showing our new design;
FIG. 2 is a rear perspective view thereof;
FIG. 3 is a front elevational view thereof;
FIG. 4 is a rear elevational view thereof;
FIG. 5 is a side elevational view thereof;
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The dash-dash broken lines illustrate portions of the cartomizer that form no part of the claimed design.
The dash-dot lines illustrate boundary lines that form no part of the claimed design. The areas within the dash-dot lines form no part of the claimed design.