Compostable products cost the same as foam products.  Some estimates show a $0.10 increase, while surveys have shown that an overwhelming number of people are willing to pay $0.25 more for their "plate lunch" if it comes in a sustainable container.  BTW great article.  I don't know what "intern" means in your context, but this was an excellent piece.  If it had said staff writer or contributor, I wouldn't have batted an eye.  Great job!