His smirk didn't go unnoticed, but Ivy had trouble finding much malicious intent lurking in his expression. Though it had been obvious that the male had been drinking from the buckets, he only confirmed it for her by taking an even larger sip. Being poisoned hadn't been a worry of hers - perhaps if he'd been offering her the drink so readily she might be worried, but instead he'd been a bit protective of them.
For a moment, at least. Now he merely seemed like he wanted to see just how it might effect her, and she wouldn't deny that she was curious too. "Drink 'til you feel something. Sounds like a foolproof plan." Another slurp from the bucket confirmed that the taste wasn't as horrible the second time, and the burn somehow felt more pleasant. Ivy raised a brow as she paused to glance over at him. "How do you go about making this stuff, anyway? Quite the skill you have here." Even though she didn't quite know the effects firsthand, she was intrigued.