A tray device for use in treating a patient's teeth using a pattern formed from dental wax having a length and height sufficient to cover the patient's teeth. The pattern is packaged in a packaging platform for forming a tray shaped device by pressing the pattern on the platform to thereby form a tray sized to cover the selected teeth on the teeth. The package holding the platform may also have a hollow region sized and positioned to cover the pattern on the platform. The dental wax is sufficiently deformable at room temperature to permit a patient to conform the tray to the teeth.