In addition to the main drinking hole, there is also a small hole on the lid of coffee cups such as Luckin and Starbucks, and the main function of this small hole is to balance air pressure. Specifically:
Balances internal and external air pressure
When a customer drinks coffee through a large orifice, if there is no small hole to breathe, the mouth will block the flow of liquid outlet, and with the sucking action, negative pressure will be generated in the cup, which will cause the cup to deform or make it difficult for the coffee to flow out normally. The presence of small holes allows air to enter the cup, keeping the internal and external air pressure consistent, ensuring that the coffee can be sucked out smoothly.
Prevent drinks from spilling
During the carrying process, the pressure in the cup may fluctuate due to temperature changes or bumps, and the air vents can effectively prevent the coffee from spilling or spilling due to sudden pressure release.
Heat dissipation and flavor protection
While not the primary purpose of all design holes, they also help to dissipate some of the heat and steam, helping the coffee to cool down to a suitable drinking temperature, while preventing excessive heat build-up and affecting the coffee taste.
As a result, this design detail reflects the importance of user experience and safety, while also taking into account the application of physical principles to ensure that the product is functional and practical.
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