Duckbill cups are suitable for babies around 1.5 years old, in the use of duckbill cups can promote the development of lip muscles, as well as the development of swallowing function coordination, so in the appropriate age to choose the appropriate cups and utensils, generally using bottles, straws, duckbill cups and cups, etc.. Duckbill cups are generally used for a short period of time for transitional purposes, generally lasting about 3 months. If the cups are not used appropriately during the developmental period, the long-term use of bottles will affect the development of chewing, swallowing, and even language functions.