It was a whole agonizing hour and a half class. When the bell finally rang, after Kyle had not only read the Cure for Boils, and the next twenty potions, he had also discussed with Siobhan in quite tones from behind their books how best to make this class more interesting. They had come up with limited ideas. 

At the sound of the bell Kyle shoved his book back into his bag, a green a silver bag that would have been really awkward to own if he had convinced the hat to let him follow Siobhan into Gryffindor. 

"MacFusty," Slughorn called just as the pair of them had gotten to the door to leave the room. "I expect great things from you. Your father was a model pupil." Slughorn gave her a smart grin, "And," He glanced at Kyle who still hadn't left his friend behind. "Friday, if you're free, I'll be having a small get together in my office. You should come." Slughorn at this point was purposefully not looking at Kyle.