What happens to the outside of a cup when cold liquid is placed inside cup?

When cold liquid is placed inside a cup, the outside of the cup sweats or forms water droplets. This phenomenon occurs due to condensation. When the cold liquid is poured into the cup, it lowers the temperature of the air inside the cup. As a result, the water vapor in the air condenses and forms tiny droplets of water on the outside surface of the cup. This is because water vapor condenses into a liquid when it comes into contact with a surface that is cooler than its dew point. The dew point is the temperature at which the water vapor in the air becomes saturated and starts to condense.