Putting a hand on his wrist was probably not the best way to go at this. If he smacked the bottle away when he was only poked with it, what made you think that he would react less severely to being held?

With his other hand, he grabbed onto Heiji's wrist and harshly pulled it away from himself, holding it up in front of him. He thankfully didn't do anything further than that, but he had one hell of a killer grip, so this probably wasn't comfortable at all for Heiji.