"Allow me," Sirius said, tapping the bottle with his wand and repeating the incantation from a few minutes ago. The bottle refilled itself.

Sirius had already been spoilered for quite a bit of his own life, or perhaps afterlife, so the Doctor probably couldn't do much harm at any rate.

"So how far in his future do you come from? Do you know anything else, how he's getting on?" He had to admit, he was curious. George had only been able to give him hazy details of the year following Voldemort's defeat.

((Haha, I so don't remember if the spell for that is ever given))