A segmented flotation device available in a plurality of colors, sizes, and configurations is disclosed. Each flotation device includes one or more buoyant members strung together with an elastic band. A recessed cup at each end of the device stores a coupler which is in turn secured to the elastic band. The coupler is configured with couplers for interconnecting flotation devices to create a variety of shapes and structures such as grids, float mats, and long float lines. A cord lock may be provided on the elastic band for adjusting the preloaded tension. A plurality of flotation devices can be packaged with other accessories connectable to the devices for creating a seat, mat, island or other structure, for holding beverages, or for providing awning structure.