The ornamental design for a ceramiclotionpump, as shown and described.
FIG. 1 is a bottom perspective view of a ceramic lotion pump of the invention;
FIG. 2 is a left side view thereof, with the right side being a mirror image thereof;
FIG. 3 is a front view thereof;
FIG. 4 is a top view thereof; and,
FIG. 5 is a bottom view thereof.
The broken line disclosure is understood to represent a portion of the article in which the claimed design is embodied, but which forms no part of the claimed design.