Fragments of bird's nest are often called bird's nest cups. This is because when the bird's nest is shaped in the wild, the swallows will embed them in the cave wall piece by piece to form a bowl-shaped structure, which is the swallow lantern. The shape and structure of the bird's nest cup enable it to hold more bird's nest and is easier to collect and process. In addition, Zhan Yan also helps to protect bird's nest from the external environment and is convenient for consumers to eat.

Extended content: Bird's nest is a precious food, known as "soft gold". Rich in amino acids, protein, polysaccharides and other nutrients, it is considered to have the effects of nourishing skin, nourishing lung and nourishing stomach. The origin of bird's nest is mainly concentrated in Southeast Asia, such as Indonesia and Malaysia. Because of the preciousness and scarcity of bird's nest, its price is relatively high, and it has become a hot commodity in the high-end food and tonic market.

In a word, the fragments of bird's nest are called swallow cups, because its shape and structure are more convenient for collection and processing, and also help to protect the quality of bird's nest. As a precious food, bird's nest has rich nutritional value and nourishing function.