Unfortunately, the USPS stopped providing the larger box I remembered and has cheaply provided a flatter rectangular one and a small cube. I was perusing the selection of boxes, which happened to be next to the two policemen on duty in the post office.
[picking up rectangular box]
That's a rectangle shaped box.
MY INNER MONOLOGUE
Do I look like a dumb little girl?
[picking up cube box]
That one's more like a square.
[in high pitched cartoony voice]
Oh no! Let me out! Don't put me in here!