Put anything in those cubbies you want. Use a tension rod across the front to keep them from jumping out when in transit.
FYI: Go to Wall Mart, to the shower curtain section of the store and pick up a short shower tension rod. They work great for things like this. The newer ones twist 1/2 turn and then can slide to length, then twist back 1/2 turn and they lock in place. Keep twisting and they get tighter and tighter. I used them in my refrigerator and when not in transit, I use one of these across the door for a curtain holder.
Works great! Here's mine in "action" in my refrigerator.
