A universal box top lid is adapted to be attached to the opened top of a variety of different sizes of food packaging boxes. The lid is designed to fit over the opened box top with an opened bag containing the food product inside the box being held open by an apron formed on an inner wall of the lid. The lid is provided with a cap closure that can be opened when it is desired to dispense the food product contained in the packaging box and bag, and can be closed to preserve the food product.