Tip #12 - Want your dessert to be the star of the table? This open star decorating tip pipes drop flowers, shells, swirls and stars with finely-cut teeth that produce deep ridges. It's a great tool for any decorator and can be used with standard decorating bags and couplers. Tip #21 - Perk up your cupcakes and cakes with perfect pearls and piping. This round decorating tip is ideal for balls, dots, lettering, outlines and figure piping. It's a great tool for any decorator and can be used with standard decorating bags and couplers.