Lucius was still smiling, beaming in fact, first at Regulus for his little cheer and then at Rabastan, although he quickly took the bottle back after Rabastan had released it. "No no no, Rabastan, you've hardly made a dent in it at all. Another swallow. It's rather chilly out here, after all, and you'll need the warmth in you." He told him, pressing the bottle back into the boy's hands. "We'll all match you, swallow for swallow." He told him, offering him encouragement, and no doubt they would when they returned to the Common Room and the bottles hidden there.