If you’ve ever picked up a takeaway coffee and noticed a tiny hole in the plastic lid, you might have wondered whether it was a manufacturing mistake, a strange design choice, or something you were supposed to cover with your finger.
That little opening is usually there for a good reason. It’s a vent that helps your drink flow smoothly by allowing air to enter the cup as liquid escapes through the drinking opening. Depending on the lid’s design, it can also help reduce splashing and make sipping more comfortable.
