I couldn't find a spoon, so I tried using a pen to stir my coffee. But that turned out to be a bad idea, because it got full of coffee. The it is more likely to refer to a pen than my coffee because  it's made by the same company, but I have no idea what it has to do with the
In "I couldn't find a spoon, so I tried using a pen to stir my coffee. But that turned out to be a bad idea, because it got full of coffee. ", The it is more likely to refer to a pen than my coffee because  it's made by the same company, but I have no idea what it has to do with the
This example is True.