I heard a slightly different version of the jar story in which after the sand, the professor pours a beer into the jar, then the rest of the analogy is the same

I heard a slightly different version of the jar story in which after the sand, the professor pours a beer into the jar, then the rest of the analogy is the same until the end when a student asks what the beer is supposed to represent, to which the professor says "That just shows that no matter how busy your life is, there's always time for a beer"