For portion control, look to the container
This is BS. When the fast food joint I frequent increased the size of their largest meal I just ordered the next size down & when I am full I stop eating, even when I am not done with the sandwich or onion rings.
If someone eats a larger sandwich or drinks a larger drink it is because they wanted a larger sandwich or drink. They ordered it because it was available, that is all.
This is just more "people are not responsible for their actions so we lawyers and psychiatrists can make as much jack as everyone can pay".