Soaking coffee with fruit juice can not only provide the fragrance of coffee, but also provide the freshness of fruit juice, which has the effects of refreshing the brain and supplementing vitamins. However, the sugar in juice may affect the bitterness and taste of coffee, and different kinds of juice may have different effects on the taste of coffee. Coffee soaked in milk can provide silky taste and rich milk flavor, which helps to neutralize the bitterness of coffee and soften the taste of coffee. At the same time, milk is also rich in protein and calcium, which can provide nutrition for the body. But milk may reduce the concentration and bitterness of coffee, which may not be strong enough for people who like strong coffee. Therefore, whether to make coffee with juice or milk should be decided according to your own tastes and preferences. If you like fresh taste and vitamin supplement, you can choose juice to make coffee; If you like the rich taste and silky taste, you can choose milk to make coffee.