I couldn't say yes or no as I don't use racks, but I would think that the tubs may slide open unless you secure them some how. I would also assume that the snakes would be sliding around inside of the tubs, I just think the deli cups are the easiest way to travel if you are going to do so with snakes. It's just a thought, like I said, I've only traveled once with my snakes, so I am not all that experienced.