Rusch plastic wall clock ($1.99)
I bought this shortly after moving into my current apartment (sometime in 2002). Figured it would be nice to be able to see the time in the bathroom, and it was a thematic match to the Dekad wall clock I had in the living room.
Current status: strictly decorative. Weighing in at roughly half an ounce (maybe one full ounce with battery), the clock has a marked tendency to fly off the wall and land in the sink whenever I shut the bathroom door to take a shower. After enough of these incidents, the battery holder came a little loose and the battery would inch its way out at random intervals, thus stopping time and causing me to frequently wonder if my roughly 6 foot x 6 foot bathroom were some kind of temporal singularity (like that book Singularity I read when I was 11). I'd reposition the battery, it would come loose again, and the battle would continue. Eventually I let the clock have the victory, and it remains on the bathroom wall showing the permanent time as 6:45. Whether that's AM or PM is in the eye of the beholder.