A reducible cereal box packaging for reducing the height of the cereal box as more and more cereal contained therein is consumed. The reducible cereal box packaging includes a box with a separation line extending therearound dividing the box into upper and lower portions. The box is separable along the separation line to permit separation of the upper and lower portions of the box and to define a lower opening in the upper portion of the box and a upper opening in the lower portion of the box. The upper edge of the lower portion is slidably insertable into the lower opening of the upper portion when the upper and lower portions are separated along the separation line.