The ornamental design for a vase maker, as shown and described.
FIG. 1 is a perspective view of the vase maker, with broken lines representing environmental structure; in this case the broken lines show a glass on which the vase maker lies, water in the glass, and a flower extending through the vase maker into the glass (any broken line illustration of environmental structure in the drawing is not part of the design sought to be patented);
FIG. 2 is a front perspective view of the vase maker shown in FIG. 1;
FIG. 3 is a side view of the vase maker shown in FIG. 1, the three other side views being identical (except for broken lines representing the environment, which may differ among the views);
FIG. 4 is a top view of the vase maker shown in FIG. 1; and,
FIG. 5 is a bottom view of the vase maker shown in FIG. 1.