10 and its components can be utilized in one embodiment the supply device 10 can include a supply canister or aerosol with a bag on valve system within which may have an aerosol valve with a welded bag the bag on valve system can have compressed air or other suitable gas in the supply canister or aerosol can on the outside of the bag which acts as a propellant on the circuit additive fluid which is inside the bag referring additionally to fig2 one exemplary process for filling the supply device 10 is shown for example the valve i can be preassembled with the bag 2 and then positioned in the can 6 as another example the valve i can be engaged with a rim or other structure of the can 6 such as through a crimping process an under the cup gassing process can be utilized to increase the pressure in the can to a desired amount such as 100 psi which can be utilized with a pressure control step example pressures that may be employed are in the range of 25 140 psi with a preferred range of 65 110 psi the bag 2 can then be filled with the additive 3 such as through the valve 1 or other access port the filling step can he performed in a number of different ways including through weighting in one embodiment the can 6 can be sealed to atmosphere once the crimping process and under the cup steps occur so that there is no venting of the space between the bag 2 and the can 6 in another embodiment the bag 2 can be a pleated or other reconfigurable container such as an accordion shaped container that has.