Or there is a 1.25" adapter that screws directly on. They really not that usefull as you will lose a lot of you fov at zenith in alt\az mode or lose the view around polaris in polar mode due to the lack of clearance.
I have a carry on duffel that the scope just fits (length wise) with a couple inches to spare. I wrap the scope in a beach towel for protection, leaving it bunched up a bit on either side. It's worked well.