The image appears to be a drawing of a rectangle with red and green lines on it, representing a box or container with two openings. One opening is on the top and the other is on the side. The lines are not drawn to scale, but rather serve as a guide for how the container is to be filled or emptied. There is a thin line drawn on the top of the rectangle, which might be meant to represent the edge of the container, or it could be a decorative element. The image appears to be drawn in ink or colored pencil on a light colored paper or board.