Craig,

How about those tiny plastic spheres that have a ecosystem half-life longer than Uranium-238?

>Be careful with the word Styrofoam. Dupont will be after you. It is a trademark and should always be capitalized. You think they won't find it here on the UT, think again. A friend's wife got a letter from Dupont for a term paper she wrote. That was years ago, before the Internet. Ever since then, I've used the generic term, polystyrene.