The ornamental design for a sachetpackage, as shown and described.
FIG. 1 is a perspective view of a sachet package according to our new design;
FIG. 2 is a front view of the sachet package;
FIG. 3 is a rear view of the sachet package;
FIG. 4 is a left view of the sachet package;
FIG. 5 is a right view of the sachet package;
FIG. 6 is a top view of the sachet package; and,
FIG. 7 is a bottom view of the sachet package.
In FIGS. 1-7, broken lines are used to disclose environment structures related to the claimed design for illustrative purposes and form no part of the claimed design. The broken lines in FIGS. 1-7 are used to show a sleeve wrapped around and slidable along the package for illustrative purposes only.