This is the third purchase I have made with Wayfair...Thee mattress topper had to be re positioned each morning/night...it slides off the mattress !!! this Dog feeder station was a joke ...after assembly the lid does not fix securely. When my Lab tries to eat// drink it slides back and forth. Side to side and front to back. I have wedged a piece of the packing Styrofoam in BUT that will wear out as I lift the lid to access the food storage.