The ornamental design for a holder for items with hard stems, as shown and described.
FIG. 1 is a top, front, and right side perspective view of a holder for items with hard stems showing my new design;
FIG. 2 is a front elevational view thereof;
FIG. 3 is a top plan view thereof;
FIG. 4 is a right side view thereof;
FIG. 5 is a vertical cross-sectional view thereof taken from the left along the center of the article; and,
FIG. 6 is an additional top, front, and right side perspective view thereof, with the broken-line disclosure of a tooth brush being for illustrative purposes only and forming no part of the claimed design.