Most breakfast cereals come in a box that contains a plastic bag. I have mostly stopped buying breakfast cereals, but oatmeal is necessary for one family member. Quaker brand sells a box with no plastic bag, at least they do where I live.

I had been buying Jordans because of the conservation aspect and because they taste better. Jordans has a plastic bag.

If you have the option of buying breakfast cereals in bulk, it is worth considering.