the stem valves 30 for insertion into the receptacles 20 filling the receptacles 20 with water 209 inserting the stem valves 30 into the receptacles 20 and inserting the assemblies 50 into beverage containers 100 filling each beverage container 100 with beverage 110 seaming or crimping the container lid 104 onto the container 100 then piston pumping a high pressure liquified refrigerant dose d into the receptacle 20 to exhaust the water 209 from the receptacle 20 then piston pumping liquified refrigerant r into the receptacle 20 for storage of said refrigerant r for later use as a cooling agent in yet a second embodiment of the invention a water soluble salt 211 is used as a refrigerant medium a when mixed with water in this embodiment the receptacle 20 has a valve seat hole 218 through the center of the receptacle valve seat recess 207 this configuration is shown in fig2 and fig2 this valve seat hole 218 allows fluid communication between the inside of the receptacle 20 and the container contents 110 which generally contains water as part of its recipe when the pressure inside the receptacle 20 is greater than the container contents 110 pressure when the apparatus is assembled and the valve stem 30 bottom edge 301 mates with valve seat recess 207 no fluid communication exists between the inside of receptacle 20 and the atmosphere or the inside of the receptacle 20 and the container contents 110 in this embodiment valve seat recess 207 is made to be initially tightly seated with.