A tea infuser is a device in which loose tea leaves are placed for steeping, usually in a cup; it is often called a teaball or tea maker, and sometimes a tea egg. A tea infuser performs the same function as a tea bag. The infuser is generally a small mesh or perforated metal container or covered spoon that holds tea leaves, in varying sizes to steep single or multiple servings at once. Common shapes for infusers include spherical, conical and cylindrical. One style of infuser is a split sphere with tong-like handles to open its mesh container.