If he handed you something saying what it would do, wouldn't you just complain that he was lying to you because it didn't do it as soon as you drank it?

[There's a certain tired note to Maria's tone, as if she's dealt with troublesome attitudes like that before. Right now, it just looks like this boy is intentionally starting trouble.]

That would ruin the things people actually want as well. Don't act like a brat just because you didn't like something.