"Of course I remembered." Miguel closed the box after that and left it on a little table beside the chair he was in. "Let me know if you like the flavor of the second one once you take it," he added, before sitting back in the chair.
"It's just something to help you fight off any sicknesses. Kind of like a shield protecting you against things being thrown at you. The sicknesses should just bounce off you." He wanted to explain more, about the antibodies and how he'd managed to work out how to combine his science with wizarding potions, even if he wasn't able to do the actual combining himself (Remus had done that bit), but he knew Arcturus wouldn't like that at all. So he settled for 'kind of like a shield'.
The chair was really comfortable, Miguel realized, and sat forward again. He didn't want to get too comfortable and risk dozing off. He knew Sirius was worried about things that were Rude, but falling asleep in someone else's home in the middle of the day? That seemed pretty shocking rude.