Color Swirl 3-Color Coupler - Looking for fun cupcake decorating ideas? Use the Wilton Color Swirl coupler to combine up to 3 colors! The coupler fits 2 or 3 icing bags together so you can easily pipe flawless multi-color icing swirls. Make tie dye frosting or rainbow cupcakes and color-coordinated treats! Swirl icing colors to match team, school or party colors. The options are endless.