Good old Quaker Oats and Oatmeal. Remember when the nice Quaker gentleman on the label used to say "Nothing is better for thee than me."? I do. This ad is from 1948:
And this one, from 1959:
Instant oatmeal with FIBER! from 1978:
And a somewhat current box of what is possibly consumed by more of us these days (just because it's so quick and easy) - Instant Oatmeal:
I found this great green Cameo pattern depression glass jar at a thrift shop in Diamond Springs. I passed it up the first time because it was $8, didn't have a lid, and had the little "Oatmeal" decal, which is on there for life. But, unlike what usually happens, when I went back, it was still there - so I scooped it up. I did have a lid already, which belongs to another jar - and I decided that it was perfect for holding my oatmeal packets!
Why didn't I think of that at first? If I wind up using it to hold something else, I'll just turn it around- there's no decal on the other side! Duh.