I claim the ornamental design for a beverage infusion spiral, as shown and described.
FIG. 1 is a front plan view showing my new design of indeterminate length;
FIG. 2 is a right side view thereof; and,
FIG. 3 is a perspective view showing my new design of indeterminate length.
The left side view is identical to the right side view of FIG. 2, though it is understood that the orientation of the termination of the spiral will change depending upon finished length.
The bottom, front, and rear views are identical to the top view, though it is understood that the angular orientation of the spiral terminations at the extreme ends of the spiral will change depending upon view angle and finished length, the differences which are apparent without the need for additional views thereto.