Apple juice, an interesting choice, Izaya humors Coal by taking the offered cup and sipping some. "Thanks. Not planning on trying out any of the liquor?" He looks like he could be a little underage, it's not that Izaya cares, but if Shinki kept their personalities it could be possible that their curiosities are also in tact or perhaps those societal rules would still be ingrained on them meaning the same rebellious tendencies of a teen would still be there. He is set on testing out many theories.