Not much if this article is correct. It claims that in the average Easter egg the chocolate takes up just 38% of the box, with the rest being made up of packaging. I remember reading a similar article last Easter where environmentalists were calling for Easter egg manufacturers to reduce the amount of packaging they use. The eggs to me still look the same. It makes sense that hollow eggs require a fair amount of packaging to protect the chocolate shell but if more than half of the pack contents is packaging, it seems it might be time to campaign for more chocolate in our Easter eggs.