Method for deodorizing milk: First, clean it with detergent, then pour two soups of fresh milk into a plastic cup with a key, cover it with a lid, shake well, and let each corner of the cup come into contact with the milk for about 1 minute. Then pour out the milk, and clear the orange peel of the cup. Method for deodorizing orange peel: First, clean with detergent, then put in the fresh orange peel, cover it, and enlarge it for about 3 to 4 hours. Rinse thoroughly.
Soak in salt water for 30 minutes. It is recommended to mix boiling water with edible salt first, and then soak in a ceramic container for half an hour. After half an hour, rinse with water and soda water. Mix a small amount of soda water with a basin of water, and then immerse the plastic cup in a food alkali solution. This can also remove the odor of the plastic cup. If the above methods still cannot remove the odor of the lid, it is recommended to purchase a new cup.