The ornamental design for an ornamental bottlecaphat, as shown and described.
FIG. 1 is a front view of the bottle cap hat showing my new design, the broken line showing of the bottle is for illustrative purposes only, and forms no part of the claimed design
FIG. 2 Back view
FIG. 3 Right view
FIG. 4 Left view
FIG. 5 Bottom view
FIG. 6 is a top perspective view
FIG. 7 is a bottom perspective view; and,
FIG. 8 Top view.
An ornamental bottle cap hat as shown in the accompanying drawings. The environment shown in FIG. 1 is a bottle.