Separate containers are the only real fix.

The simplest way to keep your lunch from tasting like everything else is to give each food its own container—even if it’s just a small silicone cup.

Flavors transfer two ways: direct contact and airborne aromas. Moist things soak into dry things, and strong smells (onion, garlic, fish) travel through the air inside the box. A single compartment guarantees mingling. Dividers help, but they don’t stop oily liquids from creeping under the edge.

Use little bento cups, muffin liners, or a few small glass containers inside the big box. For the nasty airborne stuff, wrap it in a sealed container or a tight zip bag. Another cheap hack: put a lettuce leaf or sheet of parchment paper between strong and mild foods. It’s not perfect, but it stops most direct contact.

You don’t need fancy stacking systems. Just stop letting everything share one open space. Your sandwich doesn’t need to taste like pickles.