[Her hand leaves the crimson bottle and moves to the dark blue, looking more like the color of the deepsea than anything you should drink, and lingers there.]

You're positive? It's supposed to make you more cautious of your surroundings, less inclined to believe someone's word if they seem like they're hiding something, so it's not exactly useful in an everyday thing yet, but... it has its uses, I guess. It's a troublesome one too.