I think all of them. Ortlieb Shuttle, Bike Box, Office. I looked at Planet Bike and several other German hard cases. I have looked at all of the soft trunk bags that are out there. I have even looked at marine boxes and some cash boxes. Yep, I think I have looked at about every box that can fit on the back of a bicycle rack and has the ability to be locked.

I'm thinking of adding one of these to the back of the box.

http://www.integratedtrackers.com/GP...em=SpyLamp.jsp