Black coffee. It is freshly brewed black coffee, not instant coffee. Caffeine in coffee is a refreshing substance. So refresh yourself, but don't drink for a long time.

Caffeine can stimulate the cerebral cortex, eliminate drowsiness, increase the ability of feeling and thinking, make people awake and have a refreshing effect. Especially black coffee without sugar.

Black coffee is coffee without any modification. Black coffee brings the original feeling of tasting coffee. Black coffee combines the five flavors of coffee, sweet, sweet and bitter. It is primitive, rough, profound and intriguing.