The ornamental design for an aerosolcontainer, as shown and described.
FIG. 1 is a perspective view of the aerosol container showing my new design;
FIG. 2 is a top view thereof;
FIG. 3 is a left side view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a right side view thereof; and,
FIG. 6 is a rear view thereof.
The bottom view forms no part of the claimed invention. The dashed lines are included for the purpose of illustrating the portions of the aerosol container that form no part of the claimed design. The appearance within the unshaded regions within and immediately adjacent to the dashed lines likewise form no part of the claimed design.