Navid, for many years I was doing the same as you. This method is pretty quick once you create a few containers ahead of time. With the bags, I found myself having to use a bunch of ties to secure them to the branch and potting soil was always spilling all over the place. These containers can be used in any position on the branch. Amazingly the cover, when snapped into place, aligns the cuts that are made on the sides of the container and secures them really snug.