What's in your bag or pocket?

It never ceases to amaze me how surprised people get when they see the contents of my bag. Like a photographer, I don't want to get caught without a camera and miss a great shot.
You never know when you come across a moment that needs to be memory stamped into your sketchbook! I always have several pens and pencils, brushes and watercolor set or two, some paper towel and of course The Sketchbook!
So what's in your pocket or bag?