The present invention relates to a bathtub comprising a tub body, said tub body comprising a bottom wall, a peripheral side wall, and a drain. The tub body comprises an upper section and a lower section attached to each other, the upper section having a bottom surface and the lower section having a top surface. The upper section and the lower section are completely detachable from each other along a detachment line between the bottom surface of the upper section and the top surface of the lower section. There is a first waterproof seal located in the peripheral side wall between the bottom surface of the upper section and the top surface of the lower section when the upper section and the lower section are attached to each other.