Method 1. Deodorization of milk: After using the plastic lunch box, clean it with detergent, then pour two tablespoons of fresh milk into the lunch box, cover it, shake it, and let every corner of the lunch box contact with milk for about one minute. Finally, pour out the milk and clean the lunch box.

Method 2: Deodorization of orange peel: After using the plastic lunch box, clean it with detergent first, then put the fresh orange peel into the lunch box, cover it and let it stand for about 3 ~ 4 hours.

Method 3: soak the lemon slices in boiling water for a period of time until the water turns yellow; Then pour the lemonade into the lunch box and let it stand for half an hour. Finally, pour out the lemonade and dry the lunch box, and the taste will be gone.

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Method four. Pour a cup of diluted vinegar into a lunch box, the capacity of which is about half that of a lunch box, and let it stand overnight, because vinegar can synthesize odor well. Rinse it with clear water the next day, put it in a cool place and dry it naturally.