1. The desert is condensed milk with sago, grapefruit and mango pieces which tastes sweet and sour.
2. After traveling with milk in their leather packs, they found at the end of the journey that the milk would turn sour.
3. In some areas, dairy farmers even waste sour milk due to oversupply.
4. Tea with butter or milk, sour milk and cheese are the favorites of all Tibetans.