Here's one of the ornaments that I gave to staff here at BCY. These were designed & made by my husband Thomas Atkinson (@darthmarmalade on Twitter). They're acrylic, about 3 x 2 inches. You can't really make it out in the picture, but they are laser-etched with the inscription "BCY HAPPY HOLIDAYS 2009" (except they don't say "BCY," they have the real branch abbreviation).
Some were green, some were red. There's also a single black one, which I kept for myself.