Narrow-necked clay jars like these were ideal for storing water. The exterior surface of these water jars (chͻkoo in Nafaanra) has been textured by rolling a twisted cord-wrapped stick (jar on the left) or a maize cob (jar on the right) across the surface and otherwise decorated with shallow grooved lines. The narrow opening inhibits evaporation while the porous fired clay walls keep the water cool. Bondakile, 1994.
