I have a co-worker using my coffee mug at work. I want to make him stop without sounding like I'm being picky. I have tried making the point indirectly that the cup belongs to me but he still uses it.

What would be the best way to go about this, as I said, without sounding like I'm being fussy.




**Edit :-**






I got to work 30 minutes early and..

 I got my cup back!![cup][1]


  [1]: https://i.sstatic.net/JtSXe.jpg