I wonder what's on her mind...
That's funny. So we were thinking about the obvious of having milk, booze, and other drinkables from your robot wife's boobas, and someone even mentioned a small microwave inside her torso (there's even a mango with that). But bento box in teh head? Clever idea, you can converse with your lunchbox while you eat from it tbh.
Food in the brain-case might be going too far, or maybe I'm just being picky. Boku no Tsuma wa Kanjou ga Nai has the torso microwave, I think I'll dump the first chapter just for giggles and shits.