Three or four compartments, max.

A good bento box needs three to four compartments — enough to keep carbs, protein, and veggies separate without turning lunch into a tray of appetizers.

The old Japanese ratio for a balanced bento is roughly 4:2:1: four parts rice or grains, two parts protein, one part vegetables. That only works if each thing has a home. So you want one big section for the main, one decent section for the side, and one or two small spots for sauce, fruit, or pickles. That’s it.

Anything past four compartments is mostly gimmick. Those adorable six-section boxes look great online and then you spend more time washing tiny lids than eating. Most of the little wells end up empty anyway. A solid two-section box with a separate sauce cup does the same job with less fuss.

Honestly, grab a lid that seals well and sections you can actually fill, and you’re done. The exact compartment count matters way less than whether the damn thing leaks in your bag.

A leaky lid ruins more lunches than a missing divider ever will.