The Larger of The Two Holes On The Coffee Cup is For Coffee

When buying coffee every day, the disposable coffee cups provided by coffee shops often have two holes on the lid. One of the two holes is a hole for the coffee to breathe, and the other is a hole for customers to drink coffee. The holes for coffee are usually larger than the air holes.

There are many types of drinking holes on coffee cups. Some drinking holes are sealed with a small raised lid, which customers need to remove before drinking, while some drinking holes on coffee cups are is open and unsealed.

The large drinking hole on the coffee cup is naturally prepared for drinking coffee, and the function of the small ventilation hole is to maintain the consistency of the air pressure inside and outside the coffee cup, which can make the coffee flow out more smoothly.

If there is no such vent hole, the mouth will completely cover the drinking hole when drinking coffee, and the quilt will become deflated with drinking. At this time, a negative pressure will be formed in the cup, and the remaining coffee will be difficult to flow out normally. The vent hole is to prevent negative pressure from forming in the cup when drinking, making drinking smoother, and preventing scalding caused by sudden outflow.

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