Marbled items get more and more popularity, and this simple knife holder is right on top! The supplies are large plastic vase/container, black poster board, nail polish, and enough black rice to fill the container to almost full. First cut the poster board so it would fit inside the plastic container. Then use the same marbling method that Elsie used here. Marble three different sheets. Marbling is so unpredictable that doing more than you need helps to ensure success. Once the paper was completely dry (3-4 hours), flatten your favorite of the three and tuck it inside the container. Then fill the inside with the black rice and add knives.