I think this is a great idea. I have a similar issue where if I buy a jar of peanut butter, I'm very likely to overindulge and eat most of it within a few days. Now, I buy individual packets of peanut butter every once in a while when I want to treat myself. I also eat a very natural diet; I've been vegan for nearly five years and eat mostly plant based foods and not so many processed foods. I have found that eating a very natural diet has helped curb overeating and helps me maintain a healthy weight more easily.