The Fulani people, also called Fulbe (pl. Pullo) or Peul, are well known for the delicate decoration of utilitarian objects such as milk bowls that reflect their nomadic and pastoral lifestyle. The history of the Fulani in West Africa begins in the fifth century A.D. Islamized early on and traveling constantly, they did not develop a tradition of figural, sculpted art.

Nigeria (1984) 10 Naira (back) - Fulani women carrying milk

In the cow-centered Fulani culture, milk bowls are also important objects for the household. They are used as storage containers for fresh, curdled milk and grains.

An artifact, symbol of the pastoral life and of the cooperation between men who keep the herd and women who milk the cows, the la'al kosam encapsulates Fulani identity. Because of their delicate chiseling, smoke-derived patina, and exquisite decorative treatment, bowls and calabashes could be considered as the true focus of aesthetic efforts of the Fulani people.

Source: Metropolitan Museum of Art and Wikipedia "Fula People"