I noted a few other reviews that mentioned warped units.  Mine also arrived warped- the acrylic plastic that the gray tray sits in was bowed and did not sit flat on dresser top, so every time it was touched to put in or take out an item it would tip. Very poor manufacturing and quality control of the product. They should not be selling it this way.  I did fix the problem by buying small rubber pads and sticking them to the four corners.  Now is stable.