The ornamental design for a flowerbouquetbag, as shown and described.
FIG. 1 is perspective view of a flower bouquet bag showing my new design;
FIG. 2 is a front view;
FIG. 3 is a rear view;
FIG. 4 is a right side view;
FIG. 5 is a left side view;
FIG. 6 is a top view;
FIG. 7 is a bottom view;
FIG. 8 is a front view showing the flower bouquet bag in an open configuration;
FIG. 9 is right side view showing flower bouquet bag in an open configuration; and,
FIG. 10 is a front view of a flower bouquet bag in its environment.
FIGS. 1-10 show a flower bouquet bag. The heavy broken lines around the edge binding of the flower bouquet bag represent stitching and forms part of the claimed design. The remaining broken lines represent environmental subject matter that forms no part of the claimed design.