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How to remove the odor in the insulation cup?

The thermos cup is convenient and practical, but after using it for a long time, some odors will inevitably be generated in the cup, which makes people feel uncomfortable. You may wish to try our method to effectively remove the odor in the insulation cup.
1. Remove odor from baking soda: Pour hot water into a thermos cup, add baking soda and shake it several times repeatedly, and then let it stand for a few minutes before pouring out water.
2. Toothpaste deodorization: Toothpaste can not only remove oral odor and clean teeth, but also remove odor in the insulated cup. Wash the cup with toothpaste and the odor disappears immediately.
3. Deodorization with salt water: Use warm boiling water and salt to prepare light salt water, pour it into a thermos cup, shake it for a while, then pour it out, then rinse with water.
4. Remove the odor by boiling: Put the thermos cup in the tea water and boil for 5 minutes, and then rinse with water to dry the odor.
5. Deodorization of milk: Pour half a cup of warm water into a thermos cup, pour a few spoonfuls of milk, shake it a few times, place it for a few minutes, and then pour it out. Then rinse with water to remove the odor.
6. Remove the odor from the orange peel: first clean the cup with detergent, then put the fresh orange peel into the cup, tighten the lid and leave it for about four hours, and finally clean the inside of the cup. Orange peels can also be replaced with lemon peels in the same way.
Tea water is prone to rancidity and odor in a high temperature environment for a long time. Tea polyphenols, vitamin C and other nutrients in the tea will be lost, and nutrients such as protein and sugar in the tea will also become a breeding ground for bacteria and mold. If you use a thermos cup for tea, do not drink it after more than four hours, otherwise it may easily cause diarrhea.