The ornamental design for a snackfoodproduct, as shown and described.
FIG. 1 is a top perspective view of the snack food product of the present invention;
FIG. 2 is a right elevation view of the snack food product of the present invention, with the left elevation view an identical image of the right elevation view;
FIG. 3 is a front elevation view of the snack food product of the present invention, with the rear elevation view an identical image of the front elevation view; and,
FIG. 4 is a top elevation view of the snack food product of the present invention, with the bottom elevation view an identical image of the top elevation view.