It is typically made of a ceramic material and is often part of a set which is composed of a cup and a matching saucer or a trio that includes a small cake or sandwich plate.
Higher quality teacups are typically made of fine white translucent porcelain and decorated with patterns.
[1] In Russian-speaking and West Asian cultures influenced by the Ottoman Empire tea is often served in a faceted glass held in a separate metal container with a handle, called a zarf in Turkish and Arabic, the podstakannik being its Russian cousin.
[6] Teacup plates originated in England in the early 1800s and provided a rest for the cup and a space for a light snack, went out of fashion in the second half of the 19th century.
A small-scale research was done by Yang et al. in 2019 to test the influence of the teacup shape on the expert evaluation of the tea taste.