invention indicated in general with the reference number 10 substantially consists of a dispenser casing 11 or body connected to a water pump 12 which is in turn fitted with a sponge prefilter according toga preferred embodiment the dispenser body 11 is made from transparent plastic and is equipped with an inner filtering element 13 which can consist of a sponge with a consistency of around 20 ppi this sponge occupying approximately all the lower half of the dispenser body in an area opposite to where the pump 12 is fitted it is also possible to use any kind of filtering element which is able to retain the microbubbles and allow only the water in which the co 2 is dissolved to pass through the end of the dispenser 11 that is to say the exterior of the part containing the filtering element 13 can be fitted with a mesh cover 14 the dispenser 11 is also equipped with a mixing chamber 15 between the sponge 13 and the area where the pump 12 is fitted the flow delivered by the pump 12 enters an inlet duct 16 positioned horizontally the upper part of the dispenser body 11 is fitted with the co 2 injector 17 which emits quantities of carbon in the gaseous state that is to say carbon dioxide from a duct 18 connected to a supply cylinder or other source it can be noted that the flow of water delivered through the inlet duct 16 positioned horizontally inside the chamber 15 is substantially at right.