Golden Shellback

I have read quite a few articles over the last few weeks about the amazing new product Golden Shellback. I just don’t understand how this can work, sure we have seen the videos of them immersing various phones in water but what about the headset ports, USB Ports and all the other openings, surely it is impossible to prevent these from taking in water as they are open ports, am I missing something here. Video of it in action after the break.