Harley?
My guess would be that those larger bottles of Pepsi or RC were 12 oz?
Pepsi and RC competed on price and size cause Coke basically owned the market.
I remember when Coke first came out with the 12 oz bottle. We thought it was too much to drink at one time, so we would share it with someone.
Don't be getting any ideas about my beer, now!
We would take our red wagons and scrounge up the bottles all afternoon for two cents each. The local park was a gold mine, cause the tourists who stopped for lunch would just throw the bottles in the trash barrels. (yes, many people on the road then took their own lunch with them. Restaurant meals would cost you a dollar!) Then the guy at the grocery store would give us the third degree when we tried to sell them to him? He suspected we went to his shed out back and were trying to sell him back his own bottles. Maybe it could have been because his son was one of us?
Great memories from over 50 years ago! What a great time to grow up in America!
Good luck and good smoking.