Refrigerate overnight. To unmold, fill a larger container or clean sink with warm (not hot) water. With clean fingers, loosen the gelatin around the edges of the mold cavities. Next, submerge the mold in the water almost up to the top edge for 5-10 seconds until edges have completely loosened from the mold. Dry the outside of the mold with a towel, place your serving platter on top, and invert to plate.