The ornamental design for the lip balm device, as shown and described.
FIG. 1 is a front elevational view of a lip balm device showing our new
design in the closed position;
FIG. 2 is a left side elevational view thereof; and,
FIG. 3 is a front elevational view showing the device in the open position,
the partially disclosed lip balm therein following the contour of the
outer casing.
The undisclosed sides of the design follow the contours of the sides shown.