Originally Posted by cheerfulgreek
You just like to pay one time, filling your cup up throughout the entire year, using the same cup.
This brings up an interesting tangent though. I didn't know up until a few months ago that you could get free refills on beverages if you dine in at fast food restaurants, those that give you the cup and let you get it yourself--McDonalds, Dairy Queen, Burger King, etc..
I rarely ever "eat-in" at fast food restaurants but was astonished to know that you could get free refills. I always figured you pay once, you drink once.