[that raised eyebrow will cause the corner of Salieri's mouth to quirk upward, slightly]

Oh, no bribery at all, I promise. I'm only repaying the generosity you offered me on our first day here. I know I didn't accept it at the time, and I wanted to make it up to you.

[he motions to the cup and the liquid in it, which is a very, very dark color, because it is indeed, a mixture of all of those liquids from the soda machine]

Therefore I've attempted to recreate your concoction from that day. I know it's a pithy imitation, but I swear to you that I did my utmost to be faithful to the original recipe.