The Porto Collins is a twist on the classic Tom Collins cocktail, using Porto wine instead of gin. It is made by combining Porto wine, lemon juice, simple syrup, and soda water in a glass with ice. The mixture is then stirred gently and garnished with a lemon slice. The Porto Collins has a refreshing and citrusy flavor, with a hint of sweetness from the Porto wine. It is a perfect choice for a sunny afternoon or a casual gathering.