I had pizza the other day from Federal Hill Pizza in Warren,RI and the pizza came in a GreenBox. I wasn't familiar with the GreenBox but I have to say after experiecing it firsthand its a useful and innovative product.
The GreenBox looks like a normal pizza box however the top of the box is perforated on the inside and splits into four sections that serve as plates. The remaining bottom part of the box also folds up into a smaller profile box for storing leftovers.
GreenBox is made from recycled corrugated cardboard and is made by Evovention based in New York.