The ornamental design for a combinedbeveragecontainerholder and removable support adaptor, as shown and described.
FIG. 1 is a perspective view of a combined beverage container holder and removable support adaptor;
FIG. 2 is a side view thereof; the opposite side view being a mirror image;
FIG. 3 is a rear view thereof;
FIG. 4 is a front view thereof;
FIG. 5 is a top view thereof; and,
FIG. 6 is a bottom view thereof.
The broken lines in FIGS. 2, 3, 4, 5 and 6 depict surface portions of the combined beverage container holder and removable support adaptor that form no part of the claim.