Sunlight beats soap on onion-smelling lunch boxes

The fastest way to get onion and garlic smells out of a lunch box is a baking soda scrub, then a few hours in the sun.

Soap gets the grease off, but the smell isn’t grease. Onions and garlic release sulfur compounds that basically soak into plastic, especially the soft, bendy kind. That’s why it keeps hitting you every time you pop the lid.

The fix is simple. Wash it like normal with hot soapy water, then make a paste out of baking soda and a little water, smear it over the whole inside, and let it sit for 15–20 minutes. Rinse. Still stinky? Wipe the inside with white vinegar and leave the box open in direct sunlight for a few hours. UV light actually breaks down the odor molecules, and this is the step most people skip.

One honest caveat: if it’s a cheap plastic container that has absorbed years of strong smells, you might not fully fix it. At some point the odor gets baked into the plastic itself, and a new container is the real answer.

Try the sun before you throw it out, though. It saves most lunch boxes.