Okay.
In the case of, say, Red Bull and Monster and those companies, when you go to the convenience store, it looks to me like they're doing aluminum cans, but when you look at companies like Coca-Cola and Pepsi and those companies, they have a variety. They have some plastic, and they have some aluminum in different shapes and sizes.
Why do they do that? Why do they have some in plastic and some in aluminum? Why don't they just do them all in aluminum?