I have one similar to Stocky, but mine is nicer.. leather bag, w/compartments. I carry my kindle, my car keys, my wallet, a pad and paper and pen, a copy of my passport, etc... and my phone.. I could not fit those things comfortably in my pocket... The bag stays with me wherever I go.. Very handy.
Mine is a lighter colored leather w/flaps and the zippered compartments are on the inside so no ugly zippers all over the place. Now that it is getting older and a bit stained, I have had a custom painting put on the outside...
I would be lost w/o it - - and it would be lost w/o me.