Kitchen Craft Sweetly Does It Medium (4cm) Plastic Icing Couplers, Blister Carded. Couplers are a great way to change the icing nozzle without having to change the icing bag, This set of two is great for when you are icing different colours at the same time, you can still have the same flexibility, Also available in small and large sizes, Part of Sweetly Does It, our extensive sugarcraft collection that offers everything you need for cake making, decorating, presentation and serving.