Does anyone else eat their bento too soon?

I pack myself a bento on the days when I'm taking the kids into town and staying at university (where I am no longer a student, but I just can't be bothered driving home when I know I'll need to drive back in a few hours). I just hang out in the student lounge at the Catholic chaplaincy, and find if I have a bento lunch I usually have to eat it before eleven because I just can, and it's so delicous, sitting there tempting me with it's smiley Kitty face. Then I'm hungry by 3, because I ate too soon. I'm guessing this problem will resolve when I have a job and can't eat whenever I feel like. Should I put less yummy food in my bento? Or make two?
Taxonomy upgrade extras: