A Cup of Coffee by Katy Perry delves into the theme of lingering feelings and unresolved sentiments from a past relationship. The song encapsulates the poignant experience of reminiscing over a past lover while indulging in a quiet moment with a cup of coffee. It portrays a sense of melancholy and nostalgia, highlighting the difficulty of moving on despite the passage of time. Key themes include longing, reflection, and emotional turmoil. Particularly poignant moments in the song include the verses where Perry reflects on moments shared with her ex-lover and the chorus which captures the essence of her ongoing emotional struggle.