It's the ever-changing case! If you think it is getting too hot inside of it, just drill some holes. If you need to gain access, get a saw, cut off a chunk, do your upgrade, then get another can and re-spray that part. Since there is no way of making this thing look the same everytime, you will always end up with a different shape.
My question is... why not make a hole for your favorite hot or cold beverage? Get that foam working for ya! How about a pencil/pen/scissor/thumbtack holder? If he made it a little bigger he could have incorporated all kinds of widgets! How about a Palm cradle cutout? I think this guy is on to something!