Professional Sliding Die Box

Magician displays a large single die and a box with 2 compartments. The die is placed in one side and the fun starts. Doors are closed, the box is tipped to one side, the door is opened to show the die has vanished. Well the audience knows the die has just slid in to the other side. Magician goes on and on as he suckers the audience into believeing they know how it's done, but at the end you open all 4 doors showing the die has really vanished only to appear in an upside down hat on the table.