The red eye is a strong coffee drink that originated in the US and has become a popular drink for those who need to stay awake and productive. It’s made by adding a shot of espresso to brewed coffee and can be consumed on the go. The drink got its name from the red-eye flight, which is a middle-of-the-night flight from the west coast to New York City and is synonymous with the need to stay awake for long hours. The red eye has a balanced flavor of sweetness, acidity, and bitterness and gives a quick jolt of caffeine. Drinking it is like having the strength of an Americano but with the body of regular drip coffee.