Cake Icer Tip 789Brand - WiltonQuickly ice the sides and top of your cake using the Wilton Cake Icer Tip 789.No coupler needed — you'll have the best results when you use a 16 in. or larger decorating bag.Ice cake top and sides with Cake Icer Tip 789, then smooth the overlaps.Tip reduces chance of getting cake crumbs in your icing, just smooth and decorate or serve.