Not the book by P. G. Wodehouse (nor Sir Raymond Bastable, nor Cosmo Wisdom, if it comes to that), as delicious and mildly intoxicating as that book is.
Instead, I would like you to apply your minds to the following conundrum: what are the ingredients of the cocktail known as a Port Flip?
Not to be confused with its cousin the Porto Flip, shown above.
A brace of hints: the port flip has three ingredients, and this is not a trick question.