besides the location of dishes on the menu, the unit price setting of dishes on the menu is also very particular. I don't know if friends have found out that when we were spending money in a global chain coffee shop, we found that a glass of water on its menu actually cost 21 yuan, and we bought a bottle of mineral water in the supermarket for only one or two yuan. Why is the water here nearly ten times more expensive? Did this water come back from the moon?