The Birthday King was founded by Hong Kong native Cai Nianyin in the 1930s. Later, he went to Vietnam due to war and developed it locally. He then became a Vietnamese brand. The fragrant taste and traditional Birthday King pattern made it famous and in the United States and Canada. It is more common in the Chinese circle.

There are two common types of birthday boy plus sugar condensed milk produced in Vietnam, namely white cans and red cans. The white cans have more easy-to-pull buckles than red cans, with thicker texture and richer frankincense flavor. Compared to the need to bring your own can opener The red can of sugar-filled condensed milk is more suitable for home use. In addition, there are 40g disposable small package condensed milk, which is often used to enhance the smoothness of the drink and add a lot of color to the Vietnamese drip coffee.