I saw that too! What a fantastic idea eh?
Another 'similar' idea has been invented by a guy in India where there are lots of street vendors selling food. He designed little spoons that are made of millet/rice flour that are strong enough to spoon up your dish of curry and if you want you can eat them when you're done (crunchy like a thick chip I guess) or you can throw them on the ground and they degrade in a couple days. He felt that the way billions of plastic spoons are thrown away to pollute and kill wildlife was a travesty so he came up with the idea of 'rice' spoons.