You're not wrong, that must be mead! [ As it is also on the table ] It is water and honey.

[ Caster downs his glass and suddenly he reaches under the table. A bottle flickers into and out of view, the illusion magic isn't his forte, so he can't keep it as invisible as he wants. That's why it's hidden. The sticker on top of it mentions High Spirit and large alcohol percentage ]

I've got something stronger— but, yeah it's not exactly legal. [ There is reason the whiskey here gets a seal of approval after all. Some of the distilleries run in secret and produce much stronger material. Some are Suspicious though. ]