1. Wipe: After opening the lid of the thermos cup, wipe the mouth of the thermos cup with toilet paper to wipe off the impurities and dust deposited on the mouth of the bottle, which is more convenient for subsequent operations and repairs.
2. Winding: After wiping the mouth of the thermos cup, wrap it with tape around the mouth of the bottle. Note that the trick here is to wrap it tightly. The smaller the gap, the smaller the possibility of heat dissipation of the thermos cup.
3. Inspection: After wrapping the thermos cup firmly, cut off the remaining tape with scissors, and then paste the end of the tape on the wall of the thermos cup to ensure that it will not fall when the lid is opened.
4. Test: Put some water in the thermos cup at this time, put the thermos cup cap on and put it in reverse. Because there is a layer of tape in the middle of the thermos cup, the liquid inside will not leak from the cap.
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