I went a week without a case and now my 5S is a little dinged up. You live and you learn. One thing is for certain, I'll never go naked on an iPhone again
Naked is how I prefer to carry, but I use a glass screen protector by Spigen. I dare to be different and I don't like seeing phones being suffocated in huge cases.
If I'm going out drinking to a bar or a gaming place where they serve drinks then I'm using a case but it is the iPhone 5S / 5C Case Ultra Fit A (Champagne Gold) Spigen Inc.
Works like a champ. Went through 1 already and I'm on my second one now. For $14 this thing can't be beat in my book. My phone has no damage at all. The glass screen protector really has helped.