I was recently super-impressed with HP. I bought a new laserjet printer to save my sanity while printing all those copies of my thesis. Then, because I had printed so many pages (sorry, trees!), the toner cartridge ran out. ...and may I just say that it ran out well after I expected it to, given the amount of printing I did.
And THEN - when I opened the box for the new cartridge, I discovered that it is SO EASY to recycle the old one. They provide you with a postage-paid mailing label, and you just stick your old cartridge into the now one's box. Which is perfectly designed to fold closed again without even needing tape.
And the whole thing even fit in a regular mailbox. Whooppee! I love it when recycling is easy.