Designer Jonathan Aspinall has developed coffee mugs that can be linked together to form a six mug chain that can (allegedly) be easily carried. Each mug has a plus shaped male connection on one side, and matching female on the other. Now I don't know about you, but if I was sporting these around the office one morning, I imagine they would be in a coworker's trunk by mid-afternoon. I'm sticking to my trusty urine sample cup. People don't even come into the cubicle, let alone think about stealing my mug.
Connectable Coffee Mugs [yankodesign]