The ornamental design for a shower caddyportion, as shown and described.
FIG. 1 is a perspective view of a shower caddy portion of the new design;
FIG. 2 is a front elevational view of the shower caddy portion of the new design;
FIG. 3 is a left side elevational view of the shower caddy portion of the new design, the right side elevational view being a mirror image thereof; and,
FIG. 4 is a top plan view of the shower caddy portion of the new design.
The portions of the Figures shown in broken lines are not part of the claimed design and are for illustration only.