I poured myself a cup of coffee in the teacher's lounge and took a sip. It wasn't Starbucks, but the jolt of hot, steamy caffeine helped wake me up.
Reference to: ________________________________________
Possible meaning: ____________________________________
Reference to: The narrator's need for caffeine to stay awake and alert.
Possible meaning: The narrator relies on caffeine, specifically a cup of coffee, to wake up and stay mentally alert. They may not care about the brand or quality of the coffee as long as it provides the desired effect.