In this project I made my own dog treat or dog bag carrier / container. We had bought our own which were $8-$10 each, and seemed kind of a rip off considering how easy they are to make.
The steps to make the carrier was simple. First find a small container to use to hold the bags or treats, which should only cost $1 or so. Next you need to make the loop to connect to your dog leash. To make this, cut a small hole in the container (small enough for a zip tie to fit through) and then place a dowel in the container. Wrap a zip tie around the dowel, then make a loop on the open end of the zip tie. Next, close this loop with another zip tie.
After this you are done it should look something like this.
It is hard to picture making this with just words. For more details on how to make it watch the following video: