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Michele D. Lee/Demand Media

Onions, the timeless aromatic used to fragrance dishes in all cuisines, leaves you with something you don't soon forget: its timeless odor. Every plant in the allium family -- garlic, onions and shallots, to name a few -- get their pungency and telltale aroma from sulfenic acids. When sliced, torn or crushed, alliums' cell walls release allinases, which convert sulfenic acids to the less-than-desirable odor that permeates the interior of plastic food-storage containers. You have to battle the dreaded onion smell with equal firepower: a cleanup plan that starts organic, and, if necessary, moves on to the big guns -- all-purpose bleach.

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Michele D. Lee/Demand Media

Mix 2 parts baking soda and 1 part lemon juice together. Coat the inside of the container and the bottom of the lid with the paste. Add more lemon juice if needed to loosen the paste.

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Michele D. Lee/Demand Media

Let the container sit for 48 hours; then wash it. Check for any additional odor. If you still detect an onion smell, mix together 1 capful of all-purpose bleach with 1 quart of water.

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Michele D. Lee/Demand Media

Tip

Place a piece of charcoal in a smelly food container and let it sit, covered, for 24 hours. Activated charcoal is a natural odor absorber, but its ability to absorb is limited by its size.