Predict the Circle/Square Brass

A small black vinyl case is introduced, and the spectators are told that inside is a prediction.
Two cards are selected by a spectator and placed onto the table. The prediction case is opened, and two poker chips are taken out and handed to a spectator.
One poker chip has a square printed on it, and the other has a circle.
The spectator is asked to place a chip on each card. The performer reaches into the vinyl case and produces two cards that match the two that the spectator picked.
The two cards have a large square and circle cut into them, which matches the spectator's choice. The card case can be shown empty.