Because Austin is based on the high school I graduated in, the colors necessary for his design are maroon, gold, black, and white. Maroon pairs with black while gold pairs with white. For the first time, Austin's diapers can now have a pawprint pattern design to make him look spiffier. There's an alternate variation of the design as well as the simple designs he would still wear.
On the flipside, Austin is flipping the bird because of his rebellious attitude to refuse to get toilet trained and wanting to be childish as long as he wants.