Ais used to make tea using leaves i.e. brewing tea by taking a specific amount (~4g for 2 people, 8g for 4) of loose leaf tea and putting it inside the infuser. The infuser is then dropped into a cup or a teapot for the amount of time needed for the tea to brew (depending on the tea, from 2 – 5 minutes). When the tea has been brewed, the infuser with the remains of leaves is removed from the brewing vessel so the tea may be poured/enjoyed.
A “ball” tea infuser:
An infuser that is included as part of the tea pot itself:
There are several variants of infusers as they can come in many shapes, sizes and designs – their purpose remains the same however!