FIG. 1 is a top front perspective view of an applicator tube showing my new design;

FIG. 2 is a side elevational view thereof, the opposite side being a mirror image;

FIG. 3 is a top plan view thereof;

FIG. 4 is a bottom plan view thereof with the bottom open;

FIG. 5 is a fragmentary side view of the bottom portion of the applicator tube after sealing, shown separately for clarity of illustration;

FIG. 6 is a fragmentary perspective view of FIG. 5; and,

FIG. 7 is a perspective view of the applicator tube after sealing.

The undisclosed insides of the applicator tube form no part of the claimed design.