Yep - back in the ‘50s and ‘60s, coke machines had 8 oz bottles and folks who used them might be taking a break (gas station attendants/mechanics for instance) and would hang out by the machine for ten minutes of chewing the fat, finish the soda, rack the bottle and be back to work. A soda was part of a short respite and not a way of life.
"Did you know that until 1955, Coca-Cola was available only as a soda fountain drink and in 6 1/2-ounce contour bottles? 1955 saw the debut of the King Size (10- and 12-ounce) and Family Size (26-ounce) contour bottles in the U.S., marking an important step in giving consumers packaging options to meet their needs...."
11 Facts About the Coca-Cola Bottle
I checked to see it my memories were correct. Collected quite a few 6.5 oz bottles along roadsides and playgrounds for the 2 cent cash refund.