A thing I’ve noticed with cereal boxes is that the wax paper bag is loose inside the box, so the only way you can really pour the cereal is to open the bag all the way across the top, so you can hold it to the upper edge of the box with a finger so the bag doesn’t fall out. But then once the bag is opened, the product tends to form a globular mass. This tends to push the front and back of the box away from each other so the box becomes misshapen, and then you can’t close the top flap anymore.
Has this always been the case? I went through a long, long period of never eating dry cereal, so I don’t know when or whether that have changed. Did the boxes use to be sturdier, or did the bags use to be glued to the inside of the boxes?