At CES -- the world's largest tech show -- the intrepid reporter faces many challenges. Most of them involve sleep (lack of), nutrition (lack of), human beings (abundance of) and coffee (usually lack of, but often, taste of). As such, it's very important that you don't go and add to that list of problems with some form of self-sabotage: the wrong cables, poor coffee choices, no backup power and, crucially, a P.O.S. bag. You and your bag are going to become close friends over the week, so it pays to get one that'll do the job, with a minimum of fuss.