So, you've probably done this with a cereal box already, but I didn't have any decorative paper...so I turned it inside out after I cut the trapezoid (?) out and cut top tabs off, and hot glued it back together.
But I could still see the label on the tall inside part, so I hot glued the trapezoid to the inside and trimmed the top edges. Now when it is filled it doesn't look like a cereal box, and besides the hot glue I only used things I would have thrown away anyway.
My husband claimed this one for his magazines, so...they aren't laying all over the floor anymore. Yea!!