"As hot coffee cools, these lactones break down to become carboxylic and chlorogenic acids. These acids present themselves via a bitter/acidic flavor in the cup," he said.

The perfect cup of coffee may begin with fresh beans and a high-quality coffee maker, but the vessel from which it’s consumed can make the difference between a hot, aromatic brew and a lukewarm ...

One group was told to briefly hold a cup of hot coffee, while the other held iced coffee. Participants who held a cup of hot coffee were more likely to see others as being generous, caring, and warm.