All thought of the lateness of the hour apparently forgotten, he hurried around his desk, took the bottle with Slughorn's memory in his uninjured hand, and strode over to the cabinet where he kept the Pensieve.
The Greatjon chuckled. " Your creepers best come fast, or my men will swarm those walls and win the Moat before you show your face. I'll make a gift of it to you when you come dawdling up" .
Maybe if you're in a hurry sometimes if you're somewhere like a pub or a bar or a cafe and you have to go quickly, but you don't want to leave half of your drink behind - you down your drink quickly, like this.