[It's tempting to try and just down it all in one go again... but that didn't help him much last time. So instead he starts dumping a bunch of sugar into it. Maybe this will help?? (also, he likes it sweet, don't judge)]

Do you have a listening problem? I said I'll deal with it later. If you're going to keep prattling at me, at least talk about something else.

[it's not exactly the best start to a conversation, but really, he could use a bit of background noise to keep him awake...]