You can also use pillow cases for transport purposes. If you choose to do this, turn the pillow case inside out, so that the seams and any loose threads are on the outside.
I will also make note, that you should always check the stitching on whatever you use, prior to using it. I got an order of snake bags one time, and apparently the stitching was loose or maybe didn't catch one side of the fabric when being stitched on one of the bags. The snake that I was housing in it (for transport to and from a show) escaped the bag and the deli cup he was in. Luckily he was found, but something like that could be disastrous.