Keenly observant eyes watched Simon drink the potion, a small part of him glad to be of assistance. Severus would never admit to that aloud, however, so he readily entered the flat at the offer.
"No, I am quite all right, thank you," he replied to the offer of drink, standing as tall as he dared to in this unfamiliar territory. The urge to look around and start cataloguing thinks was nearly overwhelming, but he managed to stand quite still, adding clearly:
"I hope you take my warning about the Calming Draught and Euphoria-Inducing Potion seriously. My methods are far more meticulous than most others and I would hate to see my work underappreciated." The tinge of pride behind the words was unmistakable. Instinctively, he turned the parcel at his side over in his hands as he contemplated turning them back to normal size.