"Its Always Sunny in Philadelphia Flip Get the Gang together, it's time for the Philadelphia Flip Cup championships! From ""It's Always Sunny in Philadelphia"" is this fun gray t-shirt decorated with red flip cups that trail across the shirt. ""Flip Cup Philadelphia"" is printed in black around the flip cups, making this a great t-shirt to wear out to your next flip cup challenge. A great shirt for any fan of this hysterical sitcom!".