A free water cooler for your office. Good for generating small talk with coworkers who would normally appear awkward or even unfriendly. Nothing says, "you're important" like hanging out with someone at the water cooler.
Plenty of space for a logo or design on the cooler base. To make objects appear to be floating inside, simply place the object over the water tank and use a mode like overlay or multiply. See what works. You may wish to bring some of the tank's highlights to the front of the object.