Baking soda helps, but your wash routine is the real fix.

Baking soda genuinely neutralizes lunch box odors, but cleaning and drying habits matter just as much.

It works because most smelly food compounds — like the sulfur ones in fish and garlic — are acidic. Baking soda is a mild base, so it reacts with them and knocks the smell out. Just put a dry open box or a couple tablespoons in a bowl inside the empty lunch box and leave it overnight. Toss it after a day or two. It’s not a myth; it’s chemistry.

That said, baking soda is a deodorizer, not a cleaner. If you skip the actual washing, you’re just masking bacteria. Wash the lunch box with hot soapy water, then do a quick rinse with white vinegar — vinegar cuts fats and lingering odors — and then let it dry completely before closing the lid. A damp, sealed container is where smells move in permanently.

The bigger fix is prevention. Strong foods should live in glass or stainless steel containers, not directly in a plastic lunch box. Plastic is porous and absorbs odors over time. Your lunch box shouldn’t be the thing holding curry; it should be holding the container that held the curry.

If a plastic container is already haunted, crumpled newspaper inside the sealed box overnight absorbs smells too — works surprisingly well.

Smell-proofing beats smell-removing every single time.