US 201414294157 A description fig1 illustrates a cross section of a wine bottle 18 with an aerator 10 of the present invention most wine bottles 18 are a standard 750 ml however there are magnum bottles and even super magnum bottles which may have different neck sizes shown is an expansion chamber 12 in accordance with the present invention the expansion chamber 12 has a top portion 14 and a bottom portion 16 which is necked down to fit into the opening 20 of the bottle 18 a sealing element 44 such as a rubber seal is shown such that fluid and or bubbles cannot escape and flow down the outside of the wine bottle 18 as shown here the sealing element 44 is in contact with an inside surface 22 of the bottle opening 20 a sealing element 44 could also be configured to seal to a top surface 24 of the bottle opening 20 or to an outside surface 26 of the bottle opening 20 there is a gas source 36 shown which may be an air pump 36 a a compressed air source 36 b a compressed oxygen source or co2 source or a manual air pump 36 c shown here is an on off switch 40 in this particular embodiment the gas source 36 is self contained and has an internal battery 38 or could be connected to an electrical outlet via an electrical cable and plug not shown the gas flow is directed through gas conduit 30 from the proximal end 32 to.