A tray carrier with ultraphobic surfaces for promoting more effective cleaning and drying of the tray carrier. In one embodiment of the invention, a distortion value for a particular mode is estimated within the transform domain, which allows for the elimination of both inverse transformation and inverse motion functions in this calculation. The lower and upper portions of the door opening panel are joined at an approximately horizontal weld line which is concealed by a passenger door, and in one embodiment, a pickup box.