I have seen several art teachers do this lesson and I knew I had to try it. I purchased metal molds from Bed,Bath and Beyond. Day one the students push a ball of clay into the mold and cut off the extra clay. Then they form a pinch pot for the top portion adding any details. I have them put their name on a piece of paper to separate the two pieces so I can later add their names to the bottom. One piece of advice, make sure you have at least a 1/4 inch thickness around the mold. It it's too thin it will crack. Bisque fire then glaze, day two and three.