The ornamental design for an cupinsert for wirelessbrassiere, as shown and described.
FIG. 1 is a front elevation view of a cup insert for wireless brassiere showing our design;
FIG. 2 is a detail view of a portion of FIG. 1; and,
FIG. 3 is a side view of FIG. 1.
The broken lines shown in FIG. 1 are for the purpose of illustrating the detailed portion of FIG. 1 shown in FIG. 2, and forms no part of the claim. The dot dash broken line in FIGS. 1 and 2 indicate cutoff boundaries for enlarged detailed portion view and form no part of the claim.