Sữa Chua Nếp Cẩm, or purple sticky rice yogurt, is a popular dessert drink in Hanoi. It is made by combining purple sticky rice with yogurt and sweetened condensed milk. The result is a creamy and slightly tangy beverage with a unique purple color. Sữa Chua Nếp Cẩm is often served chilled and can be enjoyed as a refreshing treat on a hot day. It is a popular choice among locals and tourists looking for a sweet and satisfying drink.