Jasmine tea and yak butter tea are drunk. Most Tibetans drink many cups of yak butter tea daily. The altar has permanent decorated by yak butter lamps. Raw yak milk is allowed to ferment overnight to become yak butter. Tibetans and other Himalayan peoples traditionally drink tea with milk or yak butter and salt. Yak butter is used in traditional tanning of hides. The chapel has many yak butter lamps which are carved in stone. The market also sells yak butter, cheese, wooden bowls and fabrics. Melted yak butter may be mixed, in roughly equal proportions, with roasted barley flour (tsampa).