They fit standard decorating tips and couplers and can be used without them for even more convenience, and the transparent plastic makes it easy to see how much frosting is left in the bag. They’re also great for any decorating project that requires a wide variety of creams, frostings and fillings, as there’s no need to wash out a cotton or canvas bag after each application. And cleanup couldn’t be quicker and easier: once decorating is done, the bags can simply be disposed.