When Coca-Cola first appeared on the market, one of the selling points was that it was a lot of refreshment for a pure nickel. Between advertising, fixed-price filling contracts, which helped keep the price of the end product low, the increase in vending machines and relatively low inflation, the price of a bottle of Coke in the first half of the 20th century was 5 cents.
The machines played the biggest role in the pricing issues Coca-Cola faced. In 1
simply expire the whole concept of a nickel coke from their advertising; From 1951, the nickel coke was mentioned in any new Coca-Cola advertising. Another approach, which was much more impractical and annoying for the consumer, was to set up machines so that one out of nine bottles was empty. They called it an "official void" and the buyer had to use an extra nickel to get a full bottle. We hardly need to stress how unpopular this short-lived solution was. it has never been implemented at national level.
After all, it's just as impractical, but not in such a customer-friendly way: in 1953, Coca-Cola asked the US Treasury to spend 7.5 cent coins. Their motivation for lobbying was that consumers could continue to buy cokes with a single coin, but this single coin would make up for the rising cost of a bottle of Coke without the consumer having to spend a whole penny. The proposal was seriously rejected, and by the late fifties the last nickel cokes had been sold and the price of Coca-Cola, like other consumer goods, was rising with inflation.