Uli uli is a traditional Hawaiian musical instrument, often referred to as a gourd drum. It is made from a hollowed-out gourd, typically filled with small stones or seeds, which creates a rhythmic sound when shaken. Uli uli is commonly used in Hawaiian hula performances and cultural ceremonies, adding a vibrant auditory element to the dance. The instrument is usually played in pairs, with each uli uli producing a distinct tone. It is often decorated with feathers or other natural materials, reflecting the rich cultural heritage of the Hawaiian Islands. Uli uli is an important part of the broader category of Hawaiian instruments, which includes the ukulele and slack-key guitar.