Tired of your coworkers stealing your coffee mug every day forcing you to have to wash out one their nasty mugs after you’ve already washed your own mug out? The solution is to quit your job and work someplace where people respect your belongings. That or to get a Plug Mug. The Plug Mug has a small stopper plug towards the bottom, making it impossible to drink out of without it. If your coworkers swipe this mug, their coffee will pour right out the bottom, scalding them. Also ideal if you want to fill it up with coffee and then “shotgun” the entire cup into your mouth via the plug hole.

Available at Gadgetshop (UK) via geeky-gadgets