I have the article saved somewhere, I'll find it and repost it.
The ebay boxes I'm referring to are currently being tested as a "greener" option than regular boxes. They are pushing these as being reusable, but anyone who has been on the receiving end of a UPS package knows that usually isn't possible.
Here is a link telling more about these boxes. I believe they gave them away originally, but as I understand it they will eventually become mandatory and sellers WILL have to pay for them. The article I originally referred to mentioned these boxes before they even came out... I remember reading the article thinking, "that will never happen" but then sure enough, about six months later I see these boxes coming out, sounding remarkably like the description in the article...