The tray attaches to the rear of the seat to provide a place for passengers to store or hold food and drinks in place. This is one of the best way to prevent spills and mess in the back of the car, in particular when traveling with young children. This tray is compatible with car seat restraints as you can adjust the positioning along the rear of the seat using the straps supplied with the tray. Provides compartment to retain occasional drops or spill. Easy to rinse or wash under the water, no rusting parts. Just let it dry before the next trip. Packaging may vary from picture, but the tray is identical.