They did Supersize here for a bit, but stopped it 10 years ago or so, the drinks were about the size of an American regular, so the size of an American Supersize is just basically of the chart

aspartame ("0" calories sweetener) kills as much as obesity, you should not drink stuff with aspartame (or any other sweetener, you can't cheat! there's always a drawback). Drink regular soda moderately once or twice a week max if you have to.

- end of social services communication

I think an American supersize coke is equilavent to pouring a 2L bottle of coke into a cup and putting a straw in it.

and then pouring in the other 3, 2 liter bottles