Hope you got an answer by now, but if not, here's mine. I was concerned about this too before I purchased this toy. I was planning to hot glue a narrow metal drawer pull across the top, but that turned out to be not necessary. In the past several months, I purchased a total of seven of these from F & S at two different times and all of them have a bar across the top to prevent getting stuck. Makes a nice carrying handle too. :) I know it doesn't show in the photos, but it;s there. F & S should update their photo to show the bar. Sad they haven't picked up on this. They probably lost sales because of it. Too bad, because it's a great toy.
The bottom opening is HUGE, so that's not a problem.