I have started using pieces of those 'noodle' floats that kids play with in pools. You can get them for about $1.50 at Walmart, Target, etc. I just cut them in appropriate length pieces, slit the pieces lengthwise down one side of the tube, and then tape it on the end/edges of the bass so it acts like the bumper on a car. These three basses shipped to Japan in a single box and arrive safe and sound...