18 Inches piping bags made of food-grade plastic, BPA-free, non-toxic, and harmless, and you can use these pastry bags safely. Frosting piping bag can be used with or without tips, and fit all standard tips and couplers. Clear royal icing piping bags are ideal for decorating that requires different color icings and easy to see how much frosting is left. These baking piping bags 18-inch can be applied for many occasions, suitable for bakery and party birthday cakes, cupcakes cookie decorating, etc.