The ornamental design for a medical productcaseholder, as shown and described.
FIG. 1 is a perspective view of the medical product case holder, showing the new design.
FIG. 2 is a front elevation view thereof.
FIG. 3 is a rear elevation view thereof.
FIG. 4 is a right side elevation view thereof, the left side thereof being a mirror image.
FIG. 5 is a top plan view thereof; and,
FIG. 6 is a bottom plan view thereof.
The broken line showing of parts of the drawings is included for the purpose of illustrating use and environment and forms no part of the claimed design.