Was she...being serious? Sam looked out at the container. It was an odd concept, having Ruby - or what would eventually become Ruby - ask him to drink holy water. Hell, the fact that she was even in possession of any came off as odd. Odd and, as he took it from her with a hand, slightly disturbing. Not to mention the tone of voice that came along with the request. It almost seemed...polite? Politer than Ruby, no doubtedly.
"How are you gonna know if -" Ah. Peephole. Those were useful. He stepped back from the door, clearing a little distance between it and himself. Eying the hole at the door, Sam lifted the holy water with a hand and gestured toward it. Then he tipped his head back and drank down some of the liquid. No burn. He passed the test, just as he knew he would.