[drugstorecowboy]

This might be a little pedantic and certainly off topic, but Coke ads really aren't intended to convince you that you need one right now, they are intended to make sure they are the first drink you think of when you think of sodas. Everytime a waitress says "oh sorry will Pepsi be ok?" Coke ads have achieved their purpose even though they didn't sell any soda or change your preferences.

RC Cola exists right alongside Coca Cola, but has a marketing budget that is a tiny tiny fraction of Coke's, do you ever hear anyone ask for an RC Cola? Coke spends on marketing so they don't become RC Cola, not to convince you of anything.