[WrtCdEvrydy]

I wonder if there would be a market for cereals in plain plastic bags kinda like rice and beans...

Just the same bag as the inside of that cheerios box in 3oz increments with a plain label.

[stevehawk]

They do. But people never look down at the bottom shelf of the grocery story.

[jefftk]

My experience buying off-brand Cheerios is that the texture is very different: much crunchier. They're one of the few products where I don't just buy the cheap store brand version.