From Thingeek:

The Schrödinger’s Cat Mug features two molded cats. One is alive, and one was alive. If you hold the Schrödinger’s Cat Mug in your right hand, the alive cat will be facing you and the dead cat will be facing everyone else. However, if you hold the Schrödinger’s Cat Mug in your left hand, the dead cat will be facing you and the alive cat will be facing everyone else. Both sets of observers are seeing different results. This proves Erwin’s lesser theory about caffeine entanglement!

[Schrödinger’s Cat Mug – $9.99 @ Thinkgeek]