Don's drinks such as coffee and soybean milk can be refilled in some stores in some areas, but on the whole, KFC and McDonald's are not good places for refilling. After all, there are not many drinks provided, and some cities don't even have refill service.

But there are exceptions: McDonald's coffee refills are free, and Coca-Cola refills are free during the World Cup!

In KFC and McDonald's in the United States and South Korea, refills are free and there are often some crooked nuts. After one drink, you can refill it and pack it to go. Some places have self-service coke machine, which customers can use by themselves.

Extended data

In developed areas such as Europe and America, Coke and Sprite in fast food restaurants such as KFC and McDonald's can be refilled for free.

To put it simply, I'll give you steamed bread when you are hungry. Eating the first one can relieve hunger. Eating the second one will make you feel full and satisfied. I feel a little full after eating the third one and don't want to eat any more. Eating the fourth one will make you feel full and unhappy. By the time you eat the fifth and sixth, your satisfaction has completely disappeared.

In other words, people's desire for goods will decrease with the satisfaction of desire, such as steamed bread, coke and sprite that can be refilled.