On or Off caffeine?

As promised, here's another step forward thanks to technology. The only problem is I am not sure what ON and OFF really mean. When you fill the empty cup with hot liquid (coffee?), it changes from OFF to ON. Does that mean you are now ON caffeine, maybe as encouragement to co-workers to let you do the work? Do you have a better interpretation?



Here's the link if you want to buy the mug -- check out the dry erase clock!!

http://www.momastore.org/museum/moma/ProductDisplay_ON%20OFF%20Mug_10451_10001_46603_-1_11557_16151____66901