This two-color decorating-bag insert lets you make any decorating bag a striper bag. Pipe two different color icings through one tube. To use, insert a decorating tube into an Ateco reusable or disposable decorating bag. Use a coupler if you want to interchange similar size tubes. Fill half the striper bag insert with one color icing, the other half with a different color. Fill each half of the striper bag to the same level. Place the striper bag into the above Ateco bag with the tip already inserted, and decorate.