A multi-functional tray that can be used in various applications to form different products, such as planter board for green roof plantation, thermal insulation structure for roof deck insulation, solid concrete panel for building construction, etc. The tray comprises an upper portion, a lower portion, and a backing layer connected between the upper portion and the lower portion. The lower portion comprises a plurality of reservoirs with through holes. The upper portion has a plurality of partitions and securing units to secure the material in the upper portion.
