Step 4: Prepping & Firing
First take your PEZ candy lid & hollow out the bottom leaving about 1/4 to 1/2 inch thickness. This is necessary to prevent the piece from exploding in the kiln. If the clay is too thick the center will not be fully dried. Any moisture in the piece leads to cracks, or possible bits of PEZ shrapnel and nothing to show for your efforts.
On to the bigger picture...take your main piece & gentle remove the cardboard form. This will create a PEZ shell, so to speak.
Before adding that last piece on you will need to fill the "shell" with crumpled news paper to help support the shape & weight of the container while it finishes it's drying process. (The paper will easily burn away in the kiln)
You can now complete your container by adding that lonely surface piece. To do this you will score & slip the edges where the shell & your surface piece will meet. Then round out the corners with a little extra clay. (Much like slab pottery)
It's time to set the completed container & lid aside to finish drying for the kiln.
Once the pieces are bone dry, they can be loaded in the kiln & fired, becoming a solid bisque ceramic PEZ container.