The ornamental design for a receptaclesupport, as shown and described.
FIG. 1 is a top, right side perspective view of a receptacle support, showing my new design;
FIG. 2 is a top view of the receptacle support;
FIG. 3 is a bottom view of the receptacle support;
FIG. 4 is a right side view of the receptacle support;
FIG. 5 is a left side view of the receptacle support;
FIG. 6 is a front view of the receptacle support;
FIG. 7 is a rear view of the receptacle support; and,
FIG. 8 is a top, right side perspective view of the receptacle support, shown in a position of use with an exemplary laundry detergent dispenser and exemplary laundry cup.
The broken lines are shown for the purpose of illustrating both parts of the article as well as exemplary environmental subject matter. None of the broken lines form part of the claimed design.