A collapsible utility tray device with a flexible mounting feature. The device includes a main tray portion for holding various items as desired by a user. A combined back/top piece is hinged to the main tray portion, such that the back/top can be folded closed to serve as a lid for the tray, or can be folded open to serve as a back structure for mounting the device and holding the tray portion horizontal. The back/top piece is fitted with a large rubberized twist tie for flexibly attaching the device to an object. The large rubberized twist tie can also be used to keep the device closed when the back/top piece is folded down. The device further includes smaller rubberized twist ties which can be used for hanging other small items from the tray or securing items to the tray. A small light can also be included in the device.