when you go to use the bag, get a ziplock sandwich bag and fill it with the icing and the coupler and slide it in the decor bag. You can use the sandwich bag to hold the coupler, and in case the sandwich bag breaks, the deco bag will catch the rest of the icing.
Not really sure if this will work, but I guess it is worth the try. Someone wrote about how they took their food saver and put another seal in their bag so that they could pipe two colors at once. I wonder if you could just put another seal to make the bag smaller at the tip to hold the coupler. I hope this make sense.
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