The invention relates to a device in the form of a transformable craft (1). It consists of two or three sections held together, a middle part (10) and one or two end parts (stem and stem) (8, 9). When a so-called “Container & Boat”™ forms a boat, the end parts (8, 9) constitute an extension of the middle part (10). The end parts (8, 9) can be turned up 180° and be fitted into spaces intended therefor on the middle part (10). The result becomes a container (C). Container fittings (4) are placed in the corners underneath the middle part (10), while the end parts (8, 9) are provided with two container fittings (5) each. When a C & B is a boat and the end parts (8, 9) are lowered, the container fittings thereof are in the bottom. When a C & B is a container and the end parts (8, 9) are raised, the container fittings (5) thereof are on the topside.