The ornamental design for piercing disc for capsules or pods for coffee machines, as shown and described.
FIG. 1 is a perspective view of a piercing disc for capsules or pods for coffee machines;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a rear elevational view theeof;
FIG. 4 is a left side elevational view theeof, the right side elevational view being a mirror image thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a perspective bottom view thereof; and,
FIG. 7 is a detail portion of the piercing disc for capsules or pods for coffee machines, taken from above, enlarged and broken away for ease of illustration.