Not what I thought

These are nice but not quite what I expected. I figured that the trays would be exactly what they are. However, the glass covers are not what I thought. I expected them to be a cover, which they are. However, I did not think they would set flush against the back of the tray. For some reason, I thought they would be more of an open bubble os that the contents of the tray could be thicker and still protected by the cover. However, this is not the case. As they are, the only contents can be super thin if the top cover is going to be used. 
Unfortunately, this means I won't be able to use the trays and covers as initially planned. Luckily, I have some other ideas that will hopefully work with the.