The ornamental design for a fluid soapcontainer for use with dispenser unit, as shown and described.
FIG. 1 is a front elevational view of a fluid soap container for use with dispenser unit;
FIG. 2 is a rear elevational view thereof;
FIG. 3 is a left side elevational view thereof;
FIG. 4 is a right side elevational view thereof;
FIG. 5 is a top plan view thereof;
FIG. 6 is a bottom plan view thereof; and,
FIG. 7 is a perspective thereof.
The broken line showing in the figures is included for the purpose of illustrating portions of the fluid soap container for use with dispenser unit and forms no part of the claimed design.