Many critics of the Bloomberg's plan claim that soda drinkers would simply buy two 16 oz drinks to make up for their inability to buy a 24oz drink (or whatever size the large is at the establishment in question). Is there real evidence to support this idea or is it just conjecture? What percentage of soda drinkers would do this? Was it common practice for a single individual to buy multiple sodas in the days when the portions offered were smaller?
Here is a fun experiment to try yourself.
Take your favorite drink, whether that be water, juice, whatever. Now, next time your thirsty, pour yourself less than you want, and wait and see what happens. You will get more, to spoil it for you. The problem is your thinking about the issue in a manner that makes you think their thought process is , " I loves me some sugar, 30 ounces! Yee haw, i can get even fatter!", when it isn't, they are thirsty, they may be making a horrendous choice, but they are going to drink what they want, and if they don't get an appropriately sized drink , they will simply buy more, whether that is at the grocery store, or the establishment doesn't make any difference.
And the problem is, massive sodas are all about convenience. Let's take me for example, i may like soda of the diet variety, but the premise is the same.
I get the biggest soda possible, why? Because it lets me not have to make more drinks later, plain and simple. A stupidly large soda long outlasts the meal it came with, saves me from dirtying a cup, and costs much less than getting a personal sized soda from a convenience store.