What should I do if the lid of the thermos is loose?
Loose lids of thermos cups are a common problem. Here are several solutions that you can try based on your specific situation:
Release time:
2025-04-14
Loose lids of thermos cups are a common problem. Here are several solutions that you can try based on your specific situation:
1. Check the threaded part
Tighten the lid: Sometimes the lid may just not be tightened. You can try unscrewing the lid and then tightening it again to ensure even force during tightening and avoid twisting it off.
Cleaning threads: If there are debris (such as residual drinks, dirt, etc.) on the threads, it will affect the sealing and fastening of the lid. You can use a soft bristled brush dipped in a small amount of warm water or cleaning agent to gently clean the threaded part, then rinse it with clean water and dry it, and then tighten the lid again.
2. Check the sealing ring
Check the position of the sealing ring: If the sealing ring is not in the correct position, it can cause the lid to loosen. You can remove the sealing ring and check for any deformation, damage, or other issues. If the sealing ring is not damaged, make sure it is in the correct position and fully fits into the groove of the cup lid when reinstalling.
Replace sealing ring: If the sealing ring has aged, deformed or damaged, it is recommended to replace it with a new one. You can purchase the same model of sealing ring for replacement at the official after-sales point or related store of the thermos cup.
3. Check the match between the cup lid and cup body
Check if the cup lid is deformed: If the cup lid itself is deformed (possibly due to impact or high temperature deformation), even if tightened, it may feel loose. You can try soaking the lid in warm water to restore its shape, but if the deformation is severe, the lid may need to be replaced.
Check if the cup body threads are damaged: If the cup body threads are damaged (such as thread wear, breakage, etc.), even if the lid is tightened, it will feel loose. In this case, it may be necessary to replace the entire thermos or find a professional repair shop for repairs.
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