When margarine came out, it was called "Oleo Margarine". It came in a plastic bag at first, with a capsule of coloring that you had to break and then knead the bag until it was all colored. I hated having to do this. I believe the dairy industry had enough political pull to keep it this way for a while because it was in competition with butter. It wasn't long before it came out in 1/4 pound sticks already colored.
As for green tea, I knew one family that used it in the mid 50's, but I did not like it at all. It was a rare commodity.
The list is pretty much right on. Times were pretty tough where I came from, but they were tough for everyone...except maybe the very few prosperous farmers or the local pharmacist. We were all in the same boat, though, pretty much; I wouldn't trade growing up in the 50's for any time in human history. Us country folks ate pretty much what we could grow, kill, and catch.