The elastic lid and unscrewing method of thermos cups have their own advantages and disadvantages. The pop-up cover is convenient, but the sealing is poor and prone to water leakage; The unscrewing method is more complicated, but the insulation effect is better and less prone to water leakage.
1. The advantages and disadvantages of thermos cup spring lids
The elastic lid of the thermos cup is relatively convenient to use, as it can be opened with just a gentle press without the need to twist the lid forcefully. This is very convenient for people with poor hand strength. In addition, the sealing performance of the spring lid is poor, so it is usually not suitable for insulated cups with soda or other gas drinks.
However, the sealing of the spring cover is poor and prone to water leakage. If your thermos is inverted or not placed smoothly enough, liquid can easily flow out from the lid and wet your backpack or clothes. So, if you need to use a thermos to hold hot or cold water, a pop top thermos may not be suitable for you.
2. The advantages and disadvantages of unscrewing the thermos cup
The method of unscrewing the thermos cup is quite complicated, requiring a strong twisting of the lid to open it. But doing so will also bring some benefits. Firstly, the seal is good and can maintain the insulation effect of water. After unscrewing, the diameter of the cup mouth is larger, making it easier to add solid substances such as fruit slices into the thermos. Secondly, the unscrewed thermos cup is not prone to water leakage, making it very suitable for travelers or workers who need to carry it in their luggage or backpack.
Of course, there are also some shortcomings when unscrewing, such as the need to twist forcefully during use, which can be quite laborious. If you have poor hand strength or frequently come into contact with other objects while holding a thermos, you may accidentally loosen the lid and cause liquid to overflow.
3. Conclusion
Overall, the spring lid and unscrewing method of thermos cups each have their own advantages and disadvantages. If your usage scenario is stable and static, such as placing a thermos on a desktop in an office or school, a pop-up thermos is sufficient. But if your usage scenario is dynamic, such as traveling or working outside, an unscrewed thermos would be more suitable.
