Your plastic lunch box is the problem

Your plastic lunch box is the problem—once tuna or egg oil gets into the plastic, no amount of soap gets it fully out.

The smell isn’t on the surface, it’s inside. Plastic has micro-pores, and the oils from strong foods seep in and go rancid. That’s the lingering smell. Soap and hot water clean the surface but leave the oil deep in the plastic.

For containers you already own, the best quick fixes are:

• Baking soda paste: scrub it in, let it sit overnight, rinse.
• White vinegar soak: 1 part vinegar to 3 parts water, leave for a few hours.
• Direct sunlight: UV kills the bacteria that make the smell worse. A few hours on a sunny windowsill genuinely works.

But if you’re fighting the same container every week, stop fighting. Switch to glass or stainless steel. They don’t have pores, so they don’t absorb anything. A quick wash and they’re actually clean.

Wash any lunch box immediately after use too—letting it sit in a warm bag all afternoon is what lets the bacteria multiply.

Future you deserves a lunch box that doesn’t taste like Tuesday’s tuna.