A dui is a type of Chinese ritual bronze vessel used in the late Zhou dynasty and the Warring States period of ancient China. It was a food container used as a ritual vessel. Most dui consist of two bowls supported on three legs.

Ding are prehistoric and ancient Chinese cauldrons standing upon legs with a lid and two fancy facing handles. They are one of the most important shapes used in Chinese ritual bronzes. They were made in two shapes: round vessels with three legs and rectangular ones with four, the latter often called fāng dǐng "square ding (方鼎. They were used for cooking, storage, and ritual offerings to the gods or to ancestors.