What is the bag that Mongols use to drink water?

Leather hip flask or water bag, if I remember correctly, Mongols call it Bianhu Road, which is usually sold in tourist areas.

Greet each other when you meet, even strangers. When colleagues meet acquaintances, they usually ask "Hello, Saibai Nu". When you meet your elders or people you meet for the first time, you should ask, "Tasai White Slave." (hello).

Hospitality to travelers (whether they know it or not) is a traditional virtue of Mongols, who attach great importance to etiquette and rules in reception. For example, if you eat mutton, you usually give the sheep's pipa bone with meat and four long ribs to the guests. If you entertain guests with beef, give them a spine with meat, half a rib and a fat sausage.