Wilton Open Star Decorating Tips. Add drop stars, flowers, shells and waves to your cakes and cupcakes with this open star decorating tip. Pipes swirls, rosettes and more with ease for beautifully decorated cakes, cupcake and cookies. The finely cut ridges create decorations with excellent detail. A classic tool for any decorator. Stainless steel; engraved with its number for easy identification. Top-rack dishwasher safe.