This product is PLA bio-degradable plastic, which can decompose in 3-6 months (depending on moisture/conditions). It's also considered safe for use with foods.
The other type of "bio-degradable" plastic (which I think you're referring to) is ABS - which does take many years to decompose (and I don't think is safe for use with foods).
RE: Graft - Disposable corn cutlery. Impossible to throw them away!