The ornamental design for a liquiddiffuser, as shown and described.
FIG. 1 shows a top perspective view of a liquid diffuser.
FIG. 2 shows an exploded perspective view of the liquid diffuser of FIG. 1.
FIG. 3 shows a front view of the liquid diffuser of FIG. 1.
FIG. 4 shows a side view of the liquid diffuser of FIG. 1.
FIG. 5 shows another side view of the liquid diffuser of FIG. 1.
FIG. 6 shows a back view of the liquid diffuser of FIG. 1.
FIG. 7 shows a top view of the liquid diffuser of FIG. 1; and,
FIG. 8 shows a bottom view of the liquid diffuser of FIG. 1.
The shade lines in the Figures show contour and not surface ornamentation. The dash-dash type broken lines in the drawings are for the purpose of illustrating unclaimed portions of the liquid diffuser and form no part of the claimed design. The dot-dash-dot-dash type broken lines define the boundaries of the claimed design.