The ornamental design for a fluiddispensingadaptor for container, as shown and described.
FIG. 1 is a top, front perspective view of a fluid dispensing adaptor for container according to our design;
FIG. 2 is a bottom, front perspective view thereof;
FIG. 3 is a front elevational view thereof
FIG. 4 is a left side elevational view thereof;
FIG. 5 is a right side elevational view thereof,
FIG. 6 is a top plan view thereof; and,
FIG. 7 is a bottom plan view thereof
The dashed lines in the drawings depict environmental subject matter only and form no part of the claimed design. The dash-dot-dash lines in FIG. 7 form boundary portions and form no part of the claimed design.