It’s the [tag]Babykeeper[/tag], or, as the picture might suggest, your own personal toilet paper dispenser. Simply put, it’s a harness that you hook on to a bathroom stall. They hang there and watch you do your business. Then hand you toilet paper.
Seriously though, this could be handy for people who have to use the bathroom while they are out alone with their child. But carrying something around like this just doesn’t seem practical to me.