The hotel has black water.

Tap water in the United States can be drunk directly by turning on the tap. I wonder if it's five kinds of black water. All public places in the United States have direct drinking fountains (faucets that spray obliquely upwards, and there is often a shorter one next to them for children). Airports, parks, supermarkets, hospitals, shopping centers, schools, companies, government agencies and gymnasiums are everywhere. American household refrigerators can be directly connected to tap water to make ice automatically. Many of them have concave doors, and the cups are directly connected with ice or ice water to drink. There is usually an automatic ice machine at the end of the corridor of the hotel, which is directly connected with tap water to provide free ice cubes for guests, and there should also be ice buckets in the room. One thing that Americans feel unaccustomed to going abroad is that it is not easy to find a water dispenser.

American refrigerators common in airports and Arlington National Cemetery.