The ornamental design for a snackproduct, as shown and described.
FIG. 1 is a perspective view of a snack product; and,
FIG. 2 is a front view of the snack product of FIG. 1.
The evenly-spaced broken lines in FIGS. 1 and 2 illustrate portions of the snack product that form no part of the claimed design. The dash-dot-dash broken lines in FIGS. 1 and 2 illustrate the boundary of the claimed design which forms no part thereof.