Compostable packaging

Recyclable packaging is a step in the right direction, but compostable packaging...priceless! Who knows how expensive or practical this would be. But lift a glass to the folks who invented fungi replacement for Styrofoam.
http://news.nationalpost.com/news/world/ikea-fungus-mushrooms-for-packaging

I wonder what kind of mushrooms they are using and if they could be regrown from the package. It'd be neat to be able grow own thingies like that. Seeding trays are the first that came to my mind.