The ornamental design for a combined ballooncup and stick, as shown and described.
FIG. 1 is a side plan view of a combined balloon cup and stick of the present application;
FIG. 2 is a side perspective view thereof;
FIG. 3 is a second side plan view thereof;
FIG. 4 is a top plan view thereof;
FIG. 5 is a side plan view thereof;
FIG. 6 is a back plan view thereof; and,
FIG. 7 is a bottom plan view thereof.
The broken lines shown in FIG. 1 form no part of the claimed combined balloon cup and stick and are included for the purpose of illustrating environment only; The combined balloon cup and stick is shown with a symbolic break in its length. The appearance of any portion of the article between the break lines forms no part of the claimed design.