It might be a current northern Ohio promotion (i.e., not nationwide) at McDonald’s restaurants …
• $1.00 for a small coffee
• $1.00 for a medium coffee
• $1.00 for a large coffee
Bear in mind that in the USA, restaurant coffee is often drip filter stuff. I don’t know about Columbia, but that’s pretty rare here in Oz - if you order a coffee, you expect espresso. (And it’ll typically cost $3-4).
I work at a c-store/gas station. We use pretty good coffee (Java City), and charge $1.49 for 16 oz, $1.69 for 20, and $1.89 for 24. Starbucks is more, as are most coffehouses. They usually use more expensive coffees. Better or not, is debatable.
Joe