we get an explanation from william dietz former director from the cdc division of nutrition and physical activity. welcome to you. i want to start with some props that we have to help us, a 12 ounce bottle of soda that used to be thought of as a single serving, and a 20 ounce bot sell nowadays perhaps at the lower end of what people actually consume in a serving. how do the new labels deal with this growth in serving sizes. >> well, the nutrition facts panel was originally developed about 20 to 30 years ago. at a time when servings were much smaller than they are today. and the 12 ounce to the 20 ounce soda is a good illustration. another good illustration is that ice cream used to be a serving was half a cup and today it's a cup so one of the most important changes in the nutrition facts panel is an updating of pork size. >> all right so, now i want to show a proposed new label so we can see another way that these new labels would help. this emphasizes calories and the number of servings are given much more prominence here this is to overcome some of the confusion. >> well, twofold, yes