A hollow, cup-shaped (typically metal) object, set in vibration by a clapper inside or a hammer outside sruck on the rim. Cowbells are quadralateral bells that are similarly set in vibration by a clapper inside or a hammer outside sruck on the rim.
Small spherical bells with slits that surround a loose pebble or bit of metal that rattles when the bell is shaken. Sleigh bells are a row or rows of pellet bells mounted on a piece of wood or on a harness.