Meal Portion's are oversize in America?

I lived in Europe for three years, and while you can get some large meals there, one thing you cannot get is free refills on drinks, except water. It does help control your intake of soda and such, because the drinks are so much more expensive as well. With the exchange rate, sometimes you spend $5 on a 400ml (12 ounce) soda. It's crazy. The only place you can get free refills is McDonalds.