This one has made the rounds on a lot of ad blogs, but it might be new to folks in sustainable business who aren't as deep into the creative work. Click the image to enlarge and check out what happens when you add a little hot water to your global mug.
As I've asked time and again here, why can't you be doing work this simple, work this cool? The concept/execution comes from Ogilvy & Mather, China, but there's no reason you can't expect this kind fun for your marketing, too. Via ad goodness.