As shown in the figure, what does the other hole in the plastic cup cover do?
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- Closeddestoon
- 2021-08-10 08:13
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- 1Flooranonymity
- 2021-08-11 15:30
The square hole can be drunk directly, and it is often used for coffee and milk caps. The round shape can be inserted into the straw. As for the air pressure, there is a small hole next to it.