The ornamental design for an infusionpackage, as shown and described.
FIG. 1 is a top plan view of an infusion package according to this design,
with a tag extending outward therefrom, the bottom plan view being a
mirror image of FIG. 1;
FIG. 2 is a right side elevational view of the infusion package with the
tag extending therefrom, the left elevational view thereof being a mirror
image of FIG. 2; and,
FIG. 3 is a top plan view of the infusion package shown with the tag folded
thereover in an alternate position.