Warm lemonade or cold tea?

Great, your answer is correct!

Because of a higher thermal conductivity the material can transport heat much faster. The usual room temperature is at about 22°C, our body temperature at 27°C. The door knob - like everything else in the room - took on room temperature. When we touch it, it is heated up by our hand. The energy can be transported throughout the material very quickly because metal has excellent thermal conductive properties. Heat sensors in our hands are able to realize that. Therefore, the metal feels cold.