I pressed the bottom edge of the plastic between the floorboard and tupperware.
I folded the top section in about 1/2 inch and used industrial velcro to hold it in place because the top section it not straight and has a vent.
So, I used a plastic cutting mat. I have several different color of mats, but used the opaque.
I also have some red ones, but thought that might be to much red. I made some like this for my Burgman 650, then painted them black.
Anywho, here are the results:
To see the larger pics: http://tinyurl.com/o9hqc4o