We choose 3mm thickness Acrylic sheet, with two layers of fiberglass with resin. Iron hob each rim to avoid the bathtub from distortion. And two thick big pieces of wooden plate at the bottom to strengthen the tub. As the bathtub with removeable panel, support and legs. The three parts will be separated when load in container, it will save much space for you. And the separated parts can be easily installed as a whole. If there's any problem with the tub body, the front side long panel can be easily move off from the outer part. It will be very convenient for you