Eating all at once will put on more fat, as the body can only have so much glucose in the blood. Insulin is produced to turn that excess glucose into fat. If you eat large amounts, or small amounts regulary then you will have higher insulin levels causing more fat to be stored. If you spread the pringles out over days, and you leave gaps in your eating causing your blood glucose to drop, then the body produces glucagon, which converts fats into glucose. so you could eat the pringles and loose weight. its all about how you eat, and when you eat more than calories in... to a point. If you're pre diabetic, or diabetic then your body has a hard time regulating insulin, causing you to gain weight easier.