The ornamental design for a cup for fluidcontainer, as shown and described.
FIG. 1 is a front isometric view of a cup for fluid container showing our new design.
FIG. 2 is a back isometric view thereof.
FIG. 3 is a front isometric view thereof, with the cup for fluid container depicted upside down.
FIG. 4 is a top plan view thereof.
FIG. 5 is a front elevational view thereof; the rear elevational view being identical.
FIG. 6 is a bottom plan view thereof.
FIG. 7 is a cross section view showing a section taken along line 7-7 of FIG. 6; and,
FIG. 8 is a cross section view showing a section taken along line 8-8 of FIG. 6.
The broken lines in the drawings depict portions of the cup for fluid container only and form no part of the claimed design. The dashed-dotted lines in the drawings represent the bounds of the claim and form no part of the claimed design.