CoffeeBox's old-mug reflection begins with the cup a person reaches for despite owning many others. Familiar weight, a comfortable handle and memories of when it was received can make an ordinary object feel significant. That is enough to explain its place in a routine without claiming a guaranteed dopamine response or diagnosing attachment.
Consider what actually makes the mug useful. Its capacity may fit the regular recipe; its rim may feel comfortable; its color may simply be pleasing. Those preferences are separate from a claim that it changes coffee's chemical quality. A new cup can perform equally well yet carry less personal history.
Affection should not override condition. Retire damaged pieces from drinking use when chips, cracks or uncertain food-contact surfaces make suitability questionable, and preserve them as display objects if desired. For a small comparison, divide the same brew between a familiar sound mug and another suitable cup, then notice handling and cooling as well as taste. The result can deepen appreciation of the ritual without establishing a universal psychological theory or requiring anyone to replace a favorite everyday object.
The conversation
A good question can make a better brew.