This is a very special mold to make a medium size but fairly deep bowl. The result can be a simple piece or artwork as well as a utilitarian object in the dining area.
Instead of cutting the glass round try a square piece instead. Fuse identical pieces from two contrasting colours. The steep angle of this mold will reveal the bottom colour around the edges.
Large Cone Bowl, 293 x 86mm (11-7/8" x 3-5/8")