What would you do?

Take a nap.

Throw a party

I dont think it's working, may I have sone more sir?

I believe "die" is the right answer here.
Based on the method of the message, right after consumption, I can only assume it's a fast acting posion. The message is there to simply mock you, as if saying "You won't get help in time."

I casually drop it in the trash can nearby before "discovering" the body. Now they'll never know...

About time

Finish it and hope it works

*pours another cup*

Celebrate

Drink the rest of the coffee in there

Go to my worst archenemy's basement (we live close, you know, keep your enemies closer)