They are little eco notebooks. Rather than blank paper within, they hold four pages of different sized recycled sticky notes. The cover and back page are created from a 100% recycled paper board.
I think what I like best about this idea is the unexpected. Since they are so new, people aren't thinking "little post its" when they open them. They'll think clever new idea. Which is what you want them to think of your company, isn't it? And offering so many sizes, there are little notes for all kinds of office needs from marking pages to leaving little recycled reminders for people.
There is a colored version too but you have to be able to compromise some of your recycling goals. Only the eco brown notes will be created from 100% recycled materials the colored cover is created from paper board. It's still strong baby steps to full green marketing. You can still hold your head up and know you're doing the right thing as a company "Going green".