"If I did drink this, I'd most likely die. I'm not sure what's in it, I'll admit," Aqua holds up the bottle for emphasis. "But it's definitely poisonous."

Which...apparently doesn't affect whatever Lapis is! Aqua's not usually one to dwell on the unique beings she meets, but having several different kinds in one place is really throwing her.

"This is harmful to a lot of people, in fact, so I wouldn't keep offering them as drinks."

Once again, giving Lapis the benefit of the doubt. There's nothing malicious about what she's doing, anyway...