Is coffee mug theft a problem at your job? If so, you may want to take a look at Efrat Gommeh’s latest design… the Lock Cup… which is basically a coffee mug with a hole in it. When you want to use your mug, you install the plug/key and the cup will not leak. When you are done… pull the plug/key out rendering the cup pretty much useless. Combine this with the theft preventing pens and you are set.