The device for supplying water and soda, includes at least a water feeding line (2), at least a water tank (3) connected to the water feeding line (2), at least a pressurized CO2 tank (4), at least a soda tank (5), elements for transferring (6) water from the water tank (3) into the soda tank (5), elements for injecting (7) CO2 from the CO2 tank (4) into the soda tank (5) in order to mix CO2 with water and obtaining soda, first supplying elements (8) communicating with the water tank (3) for supplying water towards outside, second supplying elements (9) communicating with the soda tank (5) for supplying soda towards outside and cooling elements (20) interposed between the water tank (3) and the soda tank (5).