Consider the actions a person will go through while interacting with your product. In this case, the product is luxury slippers. Since they’re a luxury item, they come inside a nice dust ruffle, which is then placed inside the box. The purchaser would open the box, see another package nestled inside, and then discover the slippers. The simple act of layering the package adds the luxury aspect, and makes it easier for purchasers to rationalize spending the few extra dollars for the experience.