This optical illusion makes the eyes node – way trays are?

The photo tray to rotate now busily on the internet.

in the Picture seems to be more of a tray. When the trays at first look, seem to them to be inside out. But when you look at the top corner, matadorbet trays as if to turn the right way up.

the evening paper of the test group looked at time in trays. When they were turned the right way up, no longer seen upside down.

Either way the trays are? It is not from the internet found the answer, but apparently they are facing the right way, because in one picture is visible the text tray in the bottom.

How are these?