Examples of the individual-serving-in-a-bowl cereal package:
Kellogg’s Rice Krispies
Cheerios
Per Cecil it’s not that manufacturers are trying to create a 90 or 110 calorie serving. It’s that cereals are mostly protein and carbohydrates, which are 4 calories per gram, and maybe some fiber (counts as 0 calories). So it doesn’t matter what shape, color or flavor you make it, the basic contents of cereal are going to determine the calories.