Tip for fill a pastry bag
It is curious that with a little of cleverness, we can squeeze the resources at maximum.
As Chef Mommy, who, tired of not being able to control the frosting into the pastry bag as well as she wanted, she places it between plastic film, closing on both sides and then incorporate into a pastry bag. Take one end, cut it, screw the tip, and the frosting or icing is ready to decorate anything.
Ah! And most interesting is that you can reuse the pastry bag!
This step by step is described perfectly in her Blog.