The utility model relates to a pontoon platform which is constructed by at least one container or a plurality of interconnected containers, such as shipping or standard freight containers, especially consistent with ISO standard. At least some of the containers are adapted to float on water, either they are waterproof containers or they comprise a float arrangement. a intra-container water-displacing accommodating cavity, such as an inflatable bag, can be used for displacing water from the container when the inflatable bag is filled with air, or letting more water entering into the container when the inflatable bag is emptied, thereby manipulating the buoyancy or draft of the container and the same of the pontoon platform comprising the container(s).