Hey! So I'm sure everyone is familiar with how cereal is packaged in plastic bags inside the box. It's probably cheap, and still easy to roll down to keep it fresh. So how come some kinds (Honey Smacks and other sugary cereals come to mind) use foil-like bags? Maybe it's not as cheap and harder to make, or has something to do with the fact that the material is dense, to not let light in? Would seem to be a lot easier to roll back up and keep tidy, though. Anyone know about that?