Several things mentioned that I agree with to one degree or another.  

Not really mentioned- in 1950, and even when I was a kid in the 80s, a glass bottle of Coca-Cola, Dr. Pepper, Mt. Dew, etc. (and I'll argue the 10 ounce bottles were the best because they were still super cold when you emptied it)  was a treat.   Might have been a once a week treat, not something that people had a 40 ounce big gulp cup to sip on all day.