Husserl famously used a coffee cup as an example of epoché.…

Husserl famously used a coffee cup as an example of epoché. He was influenced by Plato and Aristotle, so this is a refinement of forms in particulars. So the cup he used in brackets to express that it exhibits a quality he called, [cupiness] so as not to confuse the cup as particular with its form or essence 😎